Hardlock Industry
Main lines of business
Anti-loosening fastener development, manufacturing and sales
Technological patent licensing
Hardlock Industry ⇒ HLN Hardlock Nut
HLN
Hardlock Nut
The anti-loosening nut is Hardlock’s flagship product. The concave nut in the standard product has a rim with a stopper to greatly improve operability. Refer to the Hardlock Nut with Rim – Options Table for sizes and materials with rims.
The globally recognized HLN Hardlock Nut
Leveraging the power of the wedge principle used in ancient Japanese architecture, the HLN Hardlock Nut is the ultimate self-locking nut which completely integrates the nut and the bolt.
Self-locking effect recognized by the world
The HLN Hardlock Nut passes United States NAS (National Aerospace Standard) aviation standards.
Torque and Axial Force control
Control the axial force with proper torque wherever used.
Reusable
Made of all metal with little few wear surfaces, sustains a powerful self-locking effect.
Easy and efficient
Can be easily installed with just one commercially available tool.
Economical
Reduced maintenance and labor add up to a significant savings in overall costs.
The HLN Hardlock Nut has a structure that prevents looseness through the traditional Japanese principle of the wedge. To effectively utilize the wedge structure, two nuts are used: (1) a convex nut with an eccentrically formed boss, and (2) a perfectly circular concave nut. When these nuts are fastened together, the wedge principle mechanically creates a powerful locking effect transverse to the bolt shaft. This powerful anti-loosening effect achieved with the HLN Hardlock Nut wedge completely fuses the bolt and nut. Once locked with this powerful force, the HLN Hardlock Nut is not susceptible to impulsive forces or shocks.
When a HLN Hardlock Nut concave nut with a rim is tightened, the tightening tool does not attach to the convex nut, greatly increasing the wor
-
Screw the convex nut (tightening nut) onto the target bolt manually.
-
Use a wrench, torque wrench or other tightening tool to tighten the convex nut to the torque required for the target application. The convex nut has the same nut strength as a standard single nut without using a prevailing torque, so it can be tightened in the normal fashion.
-
At this point, the convex nut has exactly the same strength as a general-purpose nut.
-
Place the concave nut (lock nut) on the convex nut and tighten manually until it no longer turns.
Before continuing with a tool, make sure that the gap between the convex nut and concave nut is about one thread pitch. If not, please refrain from using the Hardlock Nut with this bolt. If the gap is narrower than one thread, the nuts will not lock with adequate strength. When reusing a Hardlock Nut, also make sure there is a one thread gap.
-
Use a torque wrench to tighten the concave nut to the Hardlock recommended torque.
-
Even if the nuts are tightened correctly, a gap may remain depending on the bolt diameter tolerance. Regardless of whether there is a gap, if tightened correctly as described above, the Hardlock Nut will provide a strong locking effect
HLN Hardlock Nut with Rim – Options Table
|
Size
|
Class 4/low-carbon steel
(JIS SS400 equivalent)
|
Class 8/medium-carbon steel
(JIS S45C)
|
Class 10/chromium molybdenum steel (JIS SCM435)
|
A2/stainless steel (JIS SUS304 equivalent)
|
|
Electrogalvanized
(trivalent chromate)
|
Hot-dip galvanized
(HDZ35)
|
Treated with manganese phosphate
(Parkerized)
|
Treated with manganese phosphate
(Parkerized)
|
Unplated/plain
|
|
M5x0.8
|
Available
|
−
|
−
|
−
|
Available
|
|
M6x1.0
|
Available
|
−
|
−
|
−
|
Available
|
|
M8x1.25
|
Available
|
Available
|
Available
|
Available
|
Available
|
|
M10x1.5
|
Available
|
Available
|
Available
|
Available
|
Available
|
|
M12x1.75
|
Available
|
Available
|
Available
|
Available
|
Available
|
|
M14x2.0
|
−
|
−
|
−
|
−
|
−
|
|
M16x2.0
|
Available
|
Available
|
Available
|
Available
|
Available
|
|
M18x2.5
|
−
|
−
|
−
|
−
|
−
|
|
M20x2.5
|
Available
|
Available
|
Available
|
Available
|
−
|
|
M22x2.5
|
Available
|
Available
|
Available
|
Available
|
−
|
|
M24x3.0
|
Available
|
Available
|
Available
|
Available
|
−
|
|
M27x3.0
|
Available
|
Available
|
Available
|
Available
|
−
|
|
M30x3.5
|
Available
|
Available
|
Available
|
Available
|
− |
Standard Rim Type
Dimension and tightening torque tables
Standard materials and coatings
|
Material
|
Coating
|
|
Class 4/low-carbon steel (JIS SS400 equivalent)
|
Electrogalvanized (trivalent chromate)
|
|
Hot-dip galvanized (HDZ35)
|
|
Class 8/medium-carbon steel (JIS S45C)
|
Manganese Phosphate coating
|
|
Class 10/chromium molybdenum steel (JIS SCM435)
|
|
A2/stainless steel (JIS SUS304 or equivalent)
|
Unplated/plain
|
・Please contact us for other coating options.
Dimension table (M5–M30)
Unit: millimeters (mm)
|
d
|
Pitch
|
Convex nut
|
Concave nut
|
Width across flats
|
ｅ
|
Overall height
|
Rim dia.
|
Unit weight
|
|
P
|
m
|
ｍ1
|
s
|
ℓ
|
Ｄ
|
g
|
|
Normal size
|
Coarse
|
Basic
|
Tolerance
|
Basic
|
Tolerance
|
Basic
|
Tolerance
|
Approx.
|
Approx.
|
Approx.
|
Approx.
|
|
M5
|
0.8
|
4
|
+0.1
-0.15
|
4
|
+0.5
-0.2
|
8
|
0
-0.2
|
9.2
|
7.2
|
9.2
|
1.9
|
|
M6
|
1.0
|
5
|
±0.3
|
5
|
0
-0.3
|
10
|
0
-0.6
|
11.5
|
8.5
|
11.5
|
4
|
|
M8
|
1.25
|
6.5
|
0
-0.58
|
6.5
|
0
-0.58
|
13
|
0
-0.7
|
15
|
10.8
|
15.0
|
8.9
|
|
M10
|
1.5
|
8
|
0
-0.58
|
8
|
0
-0.58
|
17
|
0
-0.7
|
19.6
|
13.2
|
19.6
|
18
|
|
M12
|
1.75
|
10
|
0
-0.58
|
9.3
|
0
-0.58
|
19
|
0
-0.8
|
21.9
|
16.0
|
21.9
|
26
|
|
M16
|
2.0
|
13
|
±0.9
|
11
|
0
-0.7
|
24
|
0
-0.8
|
27.7
|
21.2
|
27.7
|
46
|
|
M20
|
2.5
|
16
|
±0.9
|
14.5
|
0
-0.7
|
30
|
0
-0.8
|
34.6
|
26.7
|
34.6
|
93
|
|
M22
|
2.5
|
18
|
±0.9
|
15.6
|
0
-1.2
|
32
|
0
-1.0
|
37
|
29.9
|
37.0
|
115
|
|
M24
|
3.0
|
19
|
±0.9
|
17.6
|
0
-1.2
|
36
|
0
-1.0
|
41.6
|
32.4
|
41.6
|
183
|
|
M27
|
3.0
|
21
|
±1.0
|
17.6
|
0
-1.2
|
41
|
0
-1.0
|
47.3
|
33.5
|
47.3
|
243
|
|
M30
|
3.5
|
23
|
±1.0
|
18.6
|
0
-1.2
|
46
|
0
-1.0
|
53.1
|
36.5
|
53.1
|
312
|
• External dimensions according to JIS B1181 (2004)/ISO 4032 (width across flats only)
• Threads screw tolerance according to JIS B0209 (2001)/ISO 965 6H
• The overall height was changed to approximate the maximum height with considerable tolerance in January 2014.
• S45C is used in the class 10 concave nut with rim
• Class 4 with HDZ35, Class 8 and Class 10 are available in sizes larger than M8.
• The basic type is also available with fine threads.
• Sizes M20–M30 made of A2/stainless steel (SUS304 equiv.) are currently available only in the basic type as the rim is under development.
• Please be advised that specifications are subject to change without notice.
Tightening torque table (M16–M130)
Unit: newton meters (N·m)
|
Nominal size
|
Reference tightening torque for the convex nut (same as general hex nut)
*70% of the bolt yield point
|
Recommended tightening torque for the concave nut
|
|
Class 4 (SS400 or equivalent)
|
Class 8 (S45C)
|
Class 10 (SCM435)
|
A2/stainless steel
(JIS SUS304 or equivalent)
|
Common to all (min.–max.)
|
|
4.8 (320 N/mm²)
|
8.8 (640 N/mm²)
|
10.9 (900 N/mm²)
|
A2-50
|
A2-70
|
|
Trivalent chromate
|
HDZ35
|
Manganese Phosphate coating
|
Plain
|
|
M5
|
2.5
|
–
|
–
|
–
|
1.6
|
3.4
|
2–3
|
|
M6
|
4.1
|
–
|
–
|
–
|
2.7
|
5.7
|
4–5
|
|
M8
|
9.8
|
23
|
19.7
|
27.7
|
6.5
|
14
|
9–13
|
|
M10
|
20
|
45
|
39
|
55
|
13
|
27
|
18–24
|
|
M12
|
34
|
79
|
68
|
96
|
22
|
48
|
27–39
|
|
M16
|
84
|
197
|
170
|
237
|
55
|
120
|
70–100
|
|
M20
|
165
|
384
|
330
|
463
|
–
|
–
|
120–200
|
|
M22
|
225
|
523
|
450
|
630
|
–
|
–
|
150–250
|
|
M24
|
285
|
664
|
570
|
801
|
–
|
–
|
160–300
|
|
M27
|
415
|
972
|
835
|
1,171
|
–
|
–
|
250–390
|
|
M30
|
565
|
1,319
|
1,130
|
1,590
|
–
|
–
|
270–440
|
• Stop tightening if full contact is reached between the convex and concave nuts before reaching the highest recommend torque.
• The reference tightening torque for the convex nut is calculated on the basis of a torque coefficient of 0.15.
• The tightening torque for the convex nut with HDZ35 is calculated on the basis of a torque coefficient of 0.35.
• For the tightening torque of the A2/stainless steel convex nut, refer to the strength classification of the bolt used.
• Because the proof load of the convex nut is the same as a general single nut, there is no unique torque value.
• The concave nut can be tightened until contact with the convex nut even if the tightening torque exceeds the recommended maximum value because the torque coefficient varies depending on the surface roughness.
• For HDZ concave nuts, tighten 50% more than the recommended torque value due to the high torque coefficient.
Basic Normal Type
Basic Normal Type: Dimension and tightening torque tables
Metric thread
Standard materials and coatings
|
Material
|
Coating
|
|
Class 4/low-carbon steel (JIS SS400 equivalent)
|
Electrogalvanized (trivalent chromate)
|
|
Hot-dip galvanized (HDZ35)
|
|
Class 8/medium-carbon steel (JIS S45C)
|
Manganese Phosphate coating
|
|
A2/stainless steel (JIS SUS304 or equivalent)
|
Unplated/plain
|
Dimensions in milimeters
Unit: mm
|
d
|
Pitch
|
Convex nut
|
Concave nut
|
Width across flats
|
e
|
Overall height
|
Unit Weight
|
|
P
|
m
|
m1
|
s
|
ℓ
|
g
|
|
Nominal Size
|
Coarse
|
Fine
|
Basic
|
Tolerance
|
Basic
|
Tolerance
|
Basic
|
Tolerance
|
Approx.
|
Approx.
|
Approx.
|
|
M6
|
1.0
|
0.75
|
5
|
±0.48
|
5
|
±0.48
|
10
|
0
-0.6
|
11.5
|
9.2
|
3.3
|
|
M8
|
1.25
|
1.0
|
6.5
|
±0.58
|
6.5
|
±0.58
|
13
|
0
-0.7
|
15
|
12
|
8.6
|
|
M10
|
1.5
|
1.25
|
8
|
±0.58
|
8
|
±0.58
|
17
|
0
-0.7
|
19.6
|
14.4
|
17.6
|
|
M12
|
1.75
|
1.25
|
10
|
±0.58
|
10
|
±0.58
|
19
|
0
-0.8
|
21.9
|
17.9
|
27.3
|
|
M14
|
2.0
|
1.5
|
11
|
±0.7
|
11
|
±0.7
|
22
|
0
-0.8
|
25.4
|
19.9
|
39
|
|
M16
|
2.0
|
1.5
|
13
|
±0.9
|
12
|
±1.0
|
24
|
0
-0.8
|
27.7
|
23.2
|
52.8
|
|
M18
|
2.5
|
1.5
|
15
|
±0.9
|
14
|
±1.0
|
27
|
0
-0.8
|
31.2
|
26.7
|
80
|
|
M20
|
2.5
|
1.5
|
16
|
±0.9
|
15
|
±1.0
|
30
|
0
-0.8
|
34.6
|
28.2
|
105
|
|
M22
|
2.5
|
1.5
|
18
|
±0.9
|
17
|
±1.0
|
32
|
0
-1.0
|
37.0
|
32.3
|
130
|
|
M24
|
3.0
|
2.0
|
19
|
±0.9
|
18
|
±1.0
|
36
|
0
-1.0
|
41.6
|
33.9
|
180
|
|
M27
|
3.0
|
2.0
|
21
|
±1.0
|
21
|
±1.0
|
41
|
0
-1.0
|
47.3
|
37.9
|
246
|
|
M30
|
3.5
|
2.0
|
23
|
±1.0
|
23
|
±1.0
|
46
|
0
-1.0
|
53.1
|
41.9
|
375
|
|
M33
|
3.5
|
2.0
|
25
|
±1.0
|
20
|
0
-1.5
|
50
|
0
-1.0
|
57.7
|
39.4
|
411
|
|
M36
|
4.0
|
3.0
|
28
|
±1.0
|
21
|
0
-1.5
|
55
|
0
-1.2
|
63.5
|
41.9
|
532
|
|
M39
|
4.0
|
3.0
|
30
|
±1.2
|
23
|
0
-1.5
|
60
|
0
-1.2
|
69.3
|
45.7
|
681
|
|
M42
|
4.5
|
4.0
|
33
|
±1.2
|
25
|
0
-1.5
|
65
|
0
-1.2
|
75.0
|
50.2
|
892
|
|
M45
|
4.5
|
4.0
|
35
|
±1.2
|
27
|
0
-1.5
|
70
|
0
-1.2
|
80.8
|
54.2
|
1,115
|
|
M48
|
5.0
|
4.0
|
37
|
±1.2
|
29
|
0
-1.5
|
75
|
0
-1.2
|
86.5
|
58.2
|
1,393
|
|
M52
|
5.0
|
4.0
|
41
|
±1.2
|
31
|
0
-1.5
|
80
|
0
-1.2
|
92.4
|
63.7
|
1,708
|
|
M56
|
5.5
|
4.0
|
44
|
±1.2
|
34
|
0
-1.5
|
85
|
0
-1.4
|
98.1
|
68.7
|
2,047
|
|
M64
|
6.0
|
4.0
|
50
|
±1.5
|
38
|
0
-1.5
|
95
|
0
-1.4
|
110
|
77
|
2,795
|
|
M68
|
53
|
±1.5
|
40
|
0
-1.7
|
100
|
0
-1.4
|
115
|
81.1
|
3,480
|
|
M72
|
57
|
±1.5
|
42
|
0
-1.7
|
105
|
0
-1.4
|
121
|
85.1
|
3,910
|
|
M76
|
60
|
±1.5
|
46
|
0
-1.7
|
110
|
0
-1.4
|
127
|
92.1
|
4,440
|
|
M80
|
63
|
±1.5
|
48
|
0
-1.7
|
115
|
0
-1.4
|
133
|
97.1
|
5,070
|
|
M85
|
67
|
±1.5
|
50
|
0
-1.7
|
120
|
0
-1.4
|
139
|
101.1
|
5,630
|
|
M90
|
71
|
±1.5
|
54
|
0
-2.0
|
130
|
0
-1.6
|
150
|
109.1
|
7,340
|
|
M95
|
75
|
±1.5
|
57
|
0
-2.0
|
135
|
0
-1.6
|
156
|
115.1
|
8,150
|
|
M100
|
79
|
±1.5
|
60
|
0
-2.0
|
145
|
0
-1.6
|
167
|
121.1
|
10,140
|
|
M105
|
83
|
±1.8
|
63
|
0
-2.0
|
150
|
0
-1.6
|
173
|
127.4
|
11,140
|
|
M110
|
87
|
±1.8
|
65
|
0
-2.0
|
155
|
0
-1.6
|
179
|
131.4
|
12,000
|
|
M115
|
91
|
±1.8
|
69
|
0
-2.0
|
165
|
0
-1.6
|
191
|
139.4
|
14,780
|
|
M120
|
95
|
±1.8
|
72
|
0
-2.0
|
170
|
0
-1.6
|
196
|
145.4
|
16,050
|
|
M125
|
99
|
±1.8
|
76
|
0
-2.0
|
180
|
0
-1.6
|
208
|
153.4
|
19,410
|
|
M130
|
103
|
±1.8
|
78
|
0
-2.0
|
185
|
0
-1.6
|
214
|
157.4
|
20,650
|
• External dimensions according to JIS B1181 (2004)/ISO 4032 (width across flats only)
• Threads screw tolerance according to JIS B0209 (2001)/ISO 965 6H
• Specifications, including size, are subject to change without notice.
Tightening Torque Table Dimensions
Unit: newton meters (N·m)
|
Nominal size
|
PitchPitch
|
Reference tightening torque for convex nut (same as general hex nut)
*70% of the bolt yield point
|
Recommended tightening torque for the concave nut
|
|
Class 4
(SS400 or equivalent)
|
Class 8
(S45C)
|
A2/stainless steel
(JIS SUS304 or equivalent)
|
Common to all materials (Min – Max)
|
|
4.8
(320 N/mm2)
|
8.8
(640 N/mm2)
|
A2-50
|
A2-70
|
|
CR3
|
HDZ35
|
Manganese Phosphate coating
|
Plain
|
|
M8
|
1.25
|
–
|
–
|
–
|
–
|
–
|
9–13
|
|
M10
|
1.5
|
–
|
–
|
–
|
–
|
–
|
18–24
|
|
M12
|
1.75
|
–
|
–
|
–
|
–
|
–
|
27–39
|
|
M14
|
2.0
|
55
|
125
|
110
|
36
|
75
|
40–58
|
|
M16
|
2.0
|
–
|
–
|
–
|
–
|
–
|
70–100
|
|
M18
|
2.5
|
115
|
270
|
230
|
75
|
165
|
100–150
|
|
M20
|
2.5
|
–
|
–
|
–
|
110
|
230
|
120–200
|
|
M22
|
2.5
|
–
|
–
|
–
|
145
|
315
|
150–250
|
|
M24
|
3.0
|
–
|
–
|
–
|
185
|
400
|
160–300
|
|
M27
|
3.0
|
–
|
–
|
–
|
275
|
585
|
250–390
|
|
M30
|
3.5
|
–
|
–
|
–
|
370
|
790
|
270–440
|
|
M33
|
3.5
|
770
|
1,795
|
1,540
|
505
|
1,080
|
290–490
|
|
M36
|
4.0
|
990
|
2,305
|
1,975
|
650
|
1,390
|
340–590
|
|
M39
|
4.0
|
1,280
|
2,985
|
2,555
|
840
|
1,800
|
390–640
|
|
M42
|
4.5
|
1,580
|
3,690
|
3,160
|
1,035
|
2,225
|
440–690
|
|
M45
|
4.5
|
1,980
|
4,620
|
3,960
|
1,300
|
2,785
|
490–740
|
|
M48
|
5.0
|
2,370
|
5,530
|
4,740
|
1,555
|
3,335
|
540–780
|
|
M52
|
5.0
|
3,075
|
7,175
|
6,150
|
2,020
|
4,325
|
590–830
|
|
M56
|
5.5
|
3,820
|
8,915
|
7,640
|
2,505
|
5,370
|
640–880
|
|
M64
|
6.0
|
5,765
|
13,445
|
11,525
|
3,780
|
8,105
|
690–930
|
|
M68
|
6,980
|
16,287
|
13,960
|
4,581
|
9,816
|
Tighten about 1 turn after tightening manually
|
|
M72
|
8,370
|
19,531
|
16,741
|
5,493
|
11,771
|
|
M76
|
9,931
|
23,172
|
19,862
|
6,517
|
13,965
|
|
M80
|
11,677
|
27,246
|
23,353
|
7,663
|
16,420
|
|
M85
|
14,131
|
32,973
|
28,263
|
9,274
|
19,872
|
|
M90
|
16,907
|
39,450
|
33,814
|
11,095
|
23,776
|
|
M95
|
20,023
|
46,721
|
40,047
|
13,140
|
28,158
|
|
M100
|
23,503
|
54,841
|
47,006
|
15,424
|
33,051
|
|
M105
|
27,363
|
63,847
|
54,726
|
17,957
|
38,479
|
|
M110
|
31,623
|
73,787
|
63,246
|
20,753
|
44,470
|
|
M115
|
36,302
|
84,705
|
72,605
|
23,823
|
51,050
|
|
M120
|
41,425
|
96,658
|
82,850
|
27,185
|
57,254
|
|
M125
|
47,006
|
109,682
|
94,013
|
30,848
|
66,103
|
|
M130
|
53,067
|
123,823
|
106,134
|
34,825
|
74,625
|
• Stop tightening if full contact is reached between the convex and concave nuts before reaching the highest recommend torque.
• The reference tightening torque for the convex nut is calculated on the basis of a torque coefficient of 0.15.
• The tightening torque for the convex nut with HDZ35 is calculated on the basis of a torque coefficient of 0.35.
• For the tightening torque of the A2/stainless steel convex nut, refer to the strength classification of the bolt used.
• Because the proof load of the convex nut is the same as a general single nut, there is no unique torque value.
• The concave nut can be tightened until contact with the convex nut even if the tightening torque exceeds the recommended maximum value because the torque coefficient varies depending on the surface roughness.
• For HDZ concave nuts, tighten 50% more than the recommended torque value due to the high torque coefficient.
Whitworth thread
Standard materials and coatings
|
Material
|
Coating
|
|
Class 4/low-carbon steel (JIS SS400 equivalent)
|
Electrogalvanized (trivalent chromate)
|
|
Hot-dip galvanized (HDZ35)
|
|
Class 8/medium-carbon steel (JIS S45C)
|
Manganese Phosphate coating
|
|
A2/stainless steel (JIS SUS304 equivalent)
|
Unplated/plain
|
Dimension table
Unit: millimeters (mm)
| Nominal size |
Convex nut |
Concave nut |
Width across flats |
e |
Overall height |
Unit Weight |
| d |
Threads per inch |
m |
m1 |
s |
ℓ |
g |
| Basic |
Tolerance |
Basic |
Tolerance |
Basic |
Tolerance |
Approx. |
Approx. |
Approx. |
| w3/8 |
16 |
8 |
±0.8 |
8 |
±0.8 |
17 |
0
-0.7 |
19.6 |
14.8 |
17 |
| w1/2 |
12 |
10 |
±0.8 |
10 |
±0.8 |
21 |
0
-0.8 |
24.2 |
18.3 |
31 |
| w5/8 |
11 |
13 |
±0.9 |
13 |
±0.9 |
26 |
0
-0.8 |
30 |
24.1 |
66 |
| w3/4 |
10 |
16 |
+0.9
-1.4 |
16 |
+0.9
-1.4 |
32 |
0
-0.8 |
37 |
29.1 |
121 |
| w7/8 |
9 |
18 |
+0.9
-1.4 |
18 |
+0.9
-1.4 |
35 |
0
-1.0 |
40.4 |
33.2 |
160 |
| w1 |
8 |
20 |
+1.0
-1.5 |
20 |
+1.0
-1.5 |
41 |
0
-1.0 |
47.3 |
35.9 |
239 |
• The JIS Standard Whitworth Threads were abolished in 1968. The above table is JISB1180/7H (1965).
• Please contact us for information regarding other sizes.
• Please be advised that specifications are subject to change without notice.
Tightening Torque Table
Unit: newton meters (N·m)
|
Nominal size
|
Reference tightening torque for the convex nut (same as general hex nut)
*70% of the bolt yield point
|
Recommended tightening torque for the concave nut
|
|
Class 4 (SS400 or equivalent)
|
Class 8 (S45C)
|
A2/stainless steel
(JIS SUS304 or equivalent)
|
Common to all (Min – Max)
|
|
4.8 (320 N/mm²)
|
8.8 (640 N/mm²)
|
A2-50
|
A2-70
|
|
CR3
|
HDZ35
|
Manganese Phosphate coating
|
Plain
|
|
w3/8
|
16
|
37
|
31
|
10
|
22
|
18–24
|
|
w1/2
|
37
|
87
|
75
|
25
|
52
|
27–39
|
|
w5/8
|
77
|
180
|
155
|
50
|
110
|
70–100
|
|
w3/4
|
135
|
320
|
275
|
90
|
190
|
120–200
|
|
w7/8
|
220
|
515
|
440
|
145
|
310
|
160–300
|
|
w1
|
330
|
770
|
660
|
215
|
465
|
270–440
|
• The reference tightening torque for the convex nut is calculated on the basis of a torque coefficient of 0.15.
• The tightening torque for the convex nut with HDZ35 is calculated on the basis of a torque coefficient of 0.35.
• For the tightening torque of the A2/stainless steel convex nut, refer to the strength classification of the bolt used.
• Because the proof load of the convex nut is the same as a general single nut, there is no unique torque value.
• The concave nut can be tightened until contact with the convex nut even if the tightening torque exceeds the recommended maximum value because the torque coefficient varies depending on the surface roughness.
• For HDZ concave nuts, tighten 50% more than the recommended torque value due to the high torque coefficient.
Unified thread
Standard Materials and Coatings
|
Strength/Material
|
Coating
|
|
ASTM A194 Grade 2H (Medium Carbon Steel)
|
Manganese Phosphate coating
|
Contact us for other materials and coatings.
Dimension Table
Unit: inch
|
Norminal Size-Threads per inch
|
Convex nut
|
Concave nut
|
Width across flats
|
ｅ
|
Overall height
|
Unit Weight
|
|
m
|
ｍ1
|
s
|
ℓ
|
g
|
|
Max.
|
Min.
|
Max.
|
Min.
|
Max.
|
Min.
|
approx
|
approx.
|
approx.
|
|
1/4-20 UNC
|
0.226
|
0.212
|
0.226
|
0.212
|
0.438
|
0.428
|
0.488
|
0.390
|
3.3
|
|
5/16-18 UNC
|
0.273
|
0.258
|
0.273
|
0.258
|
0.500
|
0.489
|
0.557
|
0.457
|
7.9
|
|
3/8-16 UNC
|
0.337
|
0.320
|
0.337
|
0.320
|
0.562
|
0.551
|
0.628
|
0.559
|
17.6
|
|
7/16-14 UNC
|
0.385
|
0.365
|
0.385
|
0.365
|
0.688
|
0.675
|
0.768
|
0.638
|
20.8
|
|
1/2-13 UNC
|
0.448
|
0.427
|
0.448
|
0.427
|
0.750
|
0.736
|
0.840
|
0.752
|
28.1
|
|
5/8-11UNC
|
0.559
|
0.515
|
0.559
|
0.515
|
0.938
|
0.922
|
1.051
|
0.972
|
53
|
|
3/4-10 UNC
|
0.665
|
0.597
|
0.665
|
0.597
|
1.125
|
1.088
|
1.240
|
1.165
|
105
|
|
7/8-9 UNC
|
0.776
|
0.704
|
0.776
|
0.704
|
1.312
|
1.269
|
1.447
|
1.370
|
130
|
|
1-8 UNC
|
0.887
|
0.811
|
0.887
|
0.811
|
1.500
|
1.450
|
1.653
|
1.567
|
246
|
|
1 1/8-7 UNC
|
0.999
|
0.919
|
0.999
|
0.919
|
1.688
|
1.631
|
1.859
|
1.776
|
310
|
|
1 1/4-7 UNC
|
1.094
|
1.010
|
0.751
|
0.667
|
1.875
|
1.812
|
2.066
|
1.583
|
324
|
|
1 3/8-6 UNC
|
1.206
|
1.118
|
0.815
|
0.727
|
2.062
|
1.994
|
2.273
|
1.728
|
436
|
|
1 1/2-6 UNC
|
1.317
|
1.225
|
0.880
|
0.788
|
2.250
|
2.175
|
2.480
|
1.843
|
551
|
|
1 3/4-5 UNC
|
1.540
|
1.440
|
1.009
|
0.909
|
2.625
|
2.538
|
2.893
|
2.189
|
896
|
|
2-4.5 UNC
|
1.763
|
1.655
|
1.138
|
1.030
|
3.000
|
2.900
|
3.306
|
2.433
|
1,363
|
• Dimensions…ASME/ANSI B18.2.2 1987(R1999)
• Thread Requirements…ANSI B1.1a-1968 2B
• The dimensions or specifications are subject to change without notice.
Tightening Torque Table
Unit: newton meters (N·m)
|
Nominal size
|
Reference tightening torque for the convex nut (same as general hex nut)
*70% of the bolt yield point
|
Recommended tightening torque for the concave nut
|
|
Class 4
Low Carbon
|
ASTM A194 Grade 2H(Medium Carbon Steel)
|
A2/stainless steel
(JIS SUS304 or equivalent)
|
Common to all (min.–max.)
|
|
4.8 (320 N/mm²)
|
A193 Grade B7 (724N/mm²)
|
A2-50
|
A2-70
|
|
CR3
|
Manganese Phosphate coating
|
Plain
|
|
1/4-20 UNC
|
–
|
8.8
|
–
|
–
|
4 – 5
|
|
5/16-18 UNC
|
–
|
18
|
–
|
–
|
9 – 13
|
|
3/8-16 UNC
|
–
|
32
|
–
|
–
|
18 – 24
|
|
7/16-14 UNC
|
–
|
51
|
–
|
–
|
27 – 39
|
|
1/2-13 UNC
|
–
|
78
|
–
|
–
|
40 – 58
|
|
5/8-11UNC
|
–
|
156
|
–
|
–
|
70 – 100
|
|
3/4-10 UNC
|
–
|
276
|
–
|
–
|
120 – 200
|
|
7/8-9 UNC
|
–
|
445
|
–
|
–
|
150 – 250
|
|
1-8 UNC
|
–
|
667
|
–
|
–
|
200 – 350
|
|
1 1/8-7 UNC
|
–
|
978
|
–
|
–
|
260 – 420
|
|
1 1/4-7 UNC
|
–
|
1,376
|
–
|
–
|
280 – 470
|
|
1 3/8-6 UNC
|
–
|
1,867
|
–
|
–
|
320 – 550
|
|
1 1/2-6 UNC
|
–
|
2,465
|
–
|
–
|
370 – 620
|
|
1 3/4-5 UNC
|
–
|
4,008
|
–
|
–
|
470 – 720
|
|
2-4.5 UNC
|
–
|
6,100
|
–
|
–
|
570 – 800
|
• Stop tightening if full contact is reached between the convex and concave nuts before reaching the highest recommend torque.
• The reference tightening torque for the convex nut is calculated on the basis of a torque coefficient of 0.15.
• For the tightening torque of the A2/stainless steel convex nut, refer to the strength classification of the bolt used.
• No tightening torque is specified for the convex nut, which shall be tightened to the appropriate torque for the application.
(The convex nut has the same strength class as regular hexagon nut and can be tightened to its maximum limit.)
• The concave nut can be tightened to come into contact either one-sided or fully even with more torque than the recommended torque to better ensure locking effect.
Basic Thin Type
HLN Hardlock Nut ⇒ Basic Thin Type: Dimension and tightening torque tables
Standard materials and coatings
|
Material
|
Coating
|
|
Class 4/low-carbon steel (JIS SS400 equivalent)
|
Electrogalvanized (trivalent chromate)
|
|
Hot-dip galvanized (HDZ35)
|
|
Class 8/medium-carbon steel (JIS S45C)
|
Manganese Phosphate coating
|
|
A2/stainless steel (JIS SUS304 or equivalent)
|
Unplated/plain
|
Dimension table (M16–M130)
Unit: mm
|
d
|
Pitch
|
Convex nut
|
Concave nut
|
Width across flats
|
e
|
Overall height
|
Unit weight
|
|
P
|
m
|
m1
|
s
|
ℓ
|
g
|
|
Nominal size
|
Coarse
|
Fine
|
Basic
|
Tolerance
|
Basic
|
Tolerance
|
Basic
|
Tolerance
|
Approx.
|
Approx.
|
Approx. |
|
M16
|
2.0
|
1.5
|
10
|
0
-0.8
|
10
|
0
-0.8
|
24
|
0
-0.8
|
27.7
|
16.3
|
36
|
|
M18
|
2.5
|
1.5
|
11
|
0
-0.9
|
11
|
0
-0.9
|
27
|
0
-0.8
|
31.2
|
17.8
|
52
|
|
M20
|
2.5
|
1.5
|
12
|
0
-0.9
|
12
|
0
-0.9
|
30
|
0
-0.8
|
34.6
|
19.3
|
67
|
|
M22
|
2.5
|
1.5
|
13
|
0
-0.9
|
13
|
0
-0.9
|
32
|
0
-1.0
|
37.0
|
21.4
|
81
|
|
M24
|
3.0
|
2.0
|
14
|
0
-0.9
|
14
|
0
-0.9
|
36
|
0
-1.0
|
41.6
|
22.9
|
116
|
|
M27
|
3.0
|
2.0
|
16
|
0
-1.4
|
16
|
0
-1.4
|
41
|
0
-1.0
|
47.3
|
25.9
|
176
|
|
M30
|
3.5
|
2.0
|
18
|
0
-1.4
|
18
|
0
-1.4
|
46
|
0
-1.0
|
53.1
|
29.9
|
260
|
|
M33
|
3.5
|
2.0
|
20
|
0
-1.5
|
20
|
0
-1.5
|
50
|
0
-1.0
|
57.7
|
33.4
|
344
|
|
M36
|
4.0
|
3.0
|
21
|
0
-1.5
|
21
|
0
-1.5
|
55
|
0
-1.2
|
63.5
|
33.9
|
424
|
|
M39
|
4.0
|
3.0
|
23
|
0
-1.5
|
23
|
0
-1.5
|
60
|
0
-1.2
|
69.3
|
37.5
|
556
|
|
M42
|
4.5
|
4.0
|
25
|
0
-1.5
|
25
|
0
-1.5
|
65
|
0
-1.2
|
75.0
|
41.0
|
730
|
|
M45
|
4.5
|
4.0
|
27
|
0
-1.5
|
27
|
0
-1.5
|
70
|
0
-1.2
|
80.8
|
45.0
|
923
|
|
M48
|
5.0
|
4.0
|
29
|
0
-1.5
|
29
|
0
-1.5
|
75
|
0
-1.2
|
86.5
|
49.0
|
1,169
|
|
M52
|
5.0
|
4.0
|
31
|
0
-1.5
|
31
|
0
-1.5
|
80
|
0
-1.2
|
92.4
|
52.5
|
1,428
|
|
M56
|
5.5
|
4.0
|
34
|
0
-1.5
|
34
|
0
-1.5
|
85
|
0
-1.4
|
98.1
|
57.5
|
1,687
|
|
M64
|
6.0
|
4.0
|
38
|
0
-1.5
|
38
|
0
-1.5
|
95
|
0
-1.4
|
110
|
63.5
|
2,304
|
|
M68
|
40
|
0
-1.7
|
40
|
0
-1.7
|
100
|
0
-1.4
|
115
|
66.6
|
3,030
|
|
M72
|
42
|
0
-1.7
|
42
|
0
-1.7
|
105
|
0
-1.4
|
121
|
68.6
|
3,060
|
|
M76
|
46
|
0
-1.7
|
46
|
0
-1.7
|
110
|
0
-1.4
|
127
|
76.6
|
3,740
|
|
M80
|
48
|
0
-1.7
|
48
|
0
-1.7
|
115
|
0
-1.4
|
133
|
80.6
|
4,250
|
|
M85
|
50
|
0
-1.7
|
50
|
0
-1.7
|
120
|
0
-1.4
|
139
|
82.6
|
4,610
|
|
M90
|
54
|
0
-2.0
|
54
|
0
-2.0
|
130
|
0
-1.6
|
150
|
90.6
|
5,900
|
|
M95
|
57
|
0
-2.0
|
57
|
0
-2.0
|
135
|
0
-1.6
|
156
|
95.6
|
6,770
|
|
M100
|
60
|
0
-2.0
|
60
|
0
-2.0
|
145
|
0
-1.6
|
167
|
100.6
|
8,430
|
|
M105
|
63
|
0
-2.0
|
63
|
0
-2.0
|
150
|
0
-1.6
|
173
|
105.6
|
9,250
|
|
M110
|
65
|
0
-2.0
|
65
|
0
-2.0
|
155
|
0
-1.6
|
179
|
107.6
|
11,750
|
|
M115
|
69
|
0
-2.0
|
69
|
0
-2.0
|
165
|
0
-1.6
|
191
|
115.6
|
12,280
|
|
M120
|
72
|
0
-2.0
|
72
|
0
-2.0
|
170
|
0
-1.6
|
196
|
120.6
|
13,330
|
|
M125
|
76
|
0
-2.0
|
76
|
0
-2.0
|
180
|
0
-1.6
|
208
|
128.6
|
16,290
|
|
M130
|
78
|
0
-2.0
|
78
|
0
-2.0
|
185
|
0
-1.6
|
214
|
130.6
|
17,150
|
• Nut shape: JIS B1181 (2004)/ISO 4032
• Screw precision: JIS B0209 (2001)/ISO 261 – 6H
• Please inquire for dimensions, pitch and other specifications not mentioned above.
• Specifications, including size, are subject to change without notice.
Tightening torque table (M16–M130)
Unit: mm
|
Nominal size
|
Pitch
|
Reference tightening torque for convex nut
*70% of the bolt yield point
|
Recommended tightening torque for convex nut
|
|
Class 4 (SS400 or equivalent)
|
Class 8 (S45C)
|
A2/stainless steel
(JIS SUS304 or equivalent)
|
Common to all materials
(min.–max.)
|
|
4.8
(320 N/mm²)
|
8.8
(640 N/mm²)
|
A2-50
|
A2-70
|
|
Trivalent chromate
|
HDZ35
|
Manganese Phosphate coating
|
Plain
|
|
M16
|
2.0
|
84
|
197
|
170
|
55
|
120
|
70–100
|
|
M18
|
2.5
|
115
|
270
|
230
|
76
|
165
|
100–150
|
|
M20
|
2.5
|
165
|
384
|
330
|
110
|
230
|
120–200
|
|
M22
|
2.5
|
225
|
523
|
450
|
145
|
315
|
150–250
|
|
M24
|
3.0
|
285
|
664
|
570
|
185
|
400
|
160–300
|
|
M27
|
3.0
|
415
|
972
|
835
|
275
|
585
|
250–390
|
|
M30
|
3.5
|
565
|
1,319
|
1,130
|
370
|
790
|
270–440
|
|
M33
|
3.5
|
770
|
1,795
|
1,540
|
505
|
1,080
|
290–490
|
|
M36
|
4.0
|
990
|
2,305
|
1,975
|
650
|
1,390
|
340–590
|
|
M39
|
4.0
|
1,280
|
2,985
|
2,555
|
840
|
1,800
|
390–640
|
|
M42
|
4.5
|
1,580
|
3,690
|
3,160
|
1,035
|
2,225
|
440–690
|
|
M45
|
4.5
|
1,980
|
4,620
|
3,960
|
1,300
|
2,785
|
490–740
|
|
M48
|
5.0
|
2,370
|
5,530
|
4,740
|
1,555
|
3,335
|
540–780
|
|
M52
|
5.0
|
3,075
|
7,175
|
6,150
|
2,020
|
4,325
|
590–830
|
|
M56
|
5.5
|
3,820
|
8,915
|
7,640
|
2,505
|
5,370
|
640–880
|
|
M64
|
6.0
|
5,765
|
13,445
|
11,525
|
3,780
|
8,105
|
690–930
|
|
M68
|
6,980
|
16,287
|
13,960
|
4,581
|
9,816
|
Tighten about 1 turn after tightening manually
|
|
M72
|
8,370
|
19,531
|
16,741
|
5,493
|
11,771
|
|
M76
|
9,931
|
23,172
|
19,862
|
6,517
|
13,965
|
|
M80
|
11,677
|
27,246
|
23,353
|
7,663
|
16,420
|
|
M85
|
14,131
|
32,973
|
28,263
|
9,274
|
19,872
|
|
M90
|
16,907
|
39,450
|
33,814
|
11,095
|
23,776
|
|
M95
|
20,023
|
46,721
|
40,047
|
13,140
|
28,158
|
|
M100
|
23,503
|
54,841
|
47,006
|
15,424
|
33,051
|
|
M105
|
27,363
|
63,847
|
54,726
|
17,957
|
38,479
|
|
M110
|
31,623
|
73,787
|
63,246
|
20,753
|
44,470
|
|
M115
|
36,302
|
84,705
|
72,605
|
23,823
|
51,050
|
|
M120
|
41,425
|
96,658
|
82,850
|
27,185
|
58,254
|
|
M125
|
47,006
|
109,682
|
94,013
|
30,848
|
66,103
|
|
M130
|
53,067
|
123,823
|
106,134
|
34,825
|
74,625
|
• The reference tightening torque for the convex nut is calculated on the basis of a torque coefficient of 0.15.
• The tightening torque for the convex nut with HDZ35 is calculated on the basis of a torque coefficient of 0.35.
• For the tightening torque of the A2/stainless steel convex nut, refer to the strength classification of the bolt used.
• The tightening torque for the convex nut is calculated as 60–80% of the basic type.
• Because the proof load of the convex nut is the same as a general single nut, there is no unique torque value.
• The concave nut can be tightened until contact with the convex nut even if the tightening torque exceeds the recommended maximum value because the torque coefficient varies depending on the surface roughness.
• For HDZ concave nuts, tighten 50% more than the recommended torque value due to the high torque coefficient.
Hardlock Industry ⇒ HLB Hardlock Bearing Nut
The globally recognized HLB Hardlock Bearing Nut
The HLB Hardlock Bearing Nut was developed with the same wedge design as the HLN Hardlock Nut and maintains an extremely effective self-locking effect. This powerful effect ensures a fully tightened state even during high-speed rotation, vibration, forward and reverse rotation and impact. We guarantee significant cost savings since it is maintenance-free.
Powerful self-locking effect
Just like the HLN Hardlock Nut, no matter the conditions the self-locking effect remains secure.
Torque and axial force control
Can be completely locked in the middle of the shaft, and adjustable positioning is also possible.
Reusable
Made of all metal with little few wear surfaces, sustains a powerful self-locking effect.
Easy and efficient
Can be easily installed with just one commercially available tool.
Economical
There are no washers or other self-locking components, and no additional processing is required. Switching to the HLB has the benefit of significant total cost reduction.
Self-locking design
-
The convex nut (A) is designed with an eccentric boss that fits with the circular concave nut (B) to lock onto the shaft using the wedge principle.
-
Due to the strong locking force created by the wedge of the HLB Hardlock Bearing Nut, the self-locking effect stays intact even if exposed to extreme impact caused by high-speed rotation.
-
The HLB Hardlock Bearing Nut demonstrates a high self-locking effect regardless of whether the concave or convex nut is tightened first since there is no effect on the perpendicular accuracy.
Tightening Torque Table
Unit: newton meters (N·m)
| Item no. |
Nominal diameter |
First nut tightening torque |
Second nut tightening torque |
| d × p |
(minimum) |
| HLB-01 |
M12 × 1 |
As per customer specification |
16 |
| HLB-02 |
M15 × 1 |
As per customer specification |
28 |
| HLB-03 |
M17 × 1 |
As per customer specification |
37 |
| HLB-04 |
M20 × 1 |
As per customer specification |
55 |
| HLB-05 |
M25 × 1.5 |
As per customer specification |
80 |
| HLB-06 |
M30 × 1.5 |
As per customer specification |
115 |
| HLB-07 |
M35 × 1.5 |
As per customer specification |
130 |
| HLB-08 |
M40 × 1.5 |
As per customer specification |
155 |
| HLB-09 |
M45 × 1.5 |
As per customer specification |
170 |
| HLB-10 |
M50 × 1.5 |
As per customer specification |
200 |
| HLB-11 |
M55 × 2 |
As per customer specification |
210 |
| HLB-12 |
M60 × 2 |
As per customer specification |
240 |
| HLB-13 |
M65 × 2 |
As per customer specification |
255 |
| HLB-14 |
M70 × 2 |
As per customer specification |
270 |
| HLB-15 |
M75 × 2 |
As per customer specification |
300 |
| HLB-16 |
M80 × 2 |
As per customer specification |
310 |
| HLB-17 |
M85 × 2 |
As per customer specification |
340 |
| HLB-18 |
M90 × 2 |
As per customer specification |
350 |
| HLB-19 |
M95 × 2 |
As per customer specification |
380 |
| HLB-20 |
M100 × 2 |
As per customer specification |
390 |
| HLB-21 |
M105 × 2 |
As per customer specification |
410 |
| HLB-22 |
M110 × 2 |
As per customer specification |
415 |
| HLB-23 |
M115 × 2 |
As per customer specification |
420 |
| HLB-24 |
M120 × 2 |
As per customer specification |
435 |
| HLB-25 |
M125 × 2 |
As per customer specification |
440 |
| HLB-26 |
M130 × 2 |
As per customer specification |
450 |
| HLB-27 |
M135 × 2 |
As per customer specification |
455 |
| HLB-28 |
M140 × 2 |
As per customer specification |
465 |
| HLB-29 |
M145 × 2 |
As per customer specification |
470 |
| HLB-30 |
M150 × 2 |
As per customer specification |
480 |
| HLB-31 |
M155 × 3 |
As per customer specification |
485 |
| HLB-32 |
M160 × 3 |
As per customer specification |
500 |
| HLB-34 |
M170 × 3 |
As per customer specification |
600 |
| HLB-36 |
M180 × 3 |
As per customer specification |
700 |
| HLB-38 |
M190 × 3 |
As per customer specification |
800 |
| HLB-40 |
M200 × 3 |
As per customer specification |
900 |
Attachment and maintenance notes
- Normally, the convex (tightening) nut is the initial nut, but the concave nut may be used as the initial nut instead.
- Tighten the initial nut (convex or concave) to the torque required for the target application.
- Tighten the secondary nut to the minimum torque value set by Hardlock. This torque value is the minimum required to pass an impact vibration test conforming to NAS 3350/3354. Exceeding this torque value for full contact of the nuts is acceptable.
- The Hardlock Bearing Nut is manufactured with a thread tolerance class of 6H. Therefore, a 6g counterpart is required.
- If you do not tighten the initial nut, make sure that you use a wrench or some other tool to hold the initial nut in place when tightening the secondary nut. This will prevent the nuts from rotating together.
- The materials for our standard products are SS400 equivalent (low-carbon steel), S45C (medium-carbon steel) and SUS304 stainless steel, and S45C for our thin-type products.
Hardlock Industry ⇒ HLS Hardlock Set Screw
HLS Hardlock Set Screw ⇒ Features
The globally recognized HLS Hardlock Set Screw
The Hardlock Set Screw is a revolutionary self-locking set screw (hex socket head set screw) which employs the wedge principle to deliver a superior self-locking effect like other Hardlock products without the need to change the conditions of the target application.
Powerful self-locking effect
Just like the HLN Hardlock Nut, no matter the conditions the self-locking effect remains secure.
Reusable
Made of all metal with little few wear surfaces, sustains a powerful self-locking effect.
Easy and efficient
Can be easily installed with just one commercially available tool.
Economical
There are no washers or other self-locking components, and no additional processing is required. Switching to the HLB has the benefit of significant total cost reduction.
Self-locking design
The convex set screw (2) is designed with an eccentric boss that fits with the circular set screw (1) to lock together using the wedge principle in the direction traverse to the shaft.
The HLS has the same powerful self-locking effect as the HLN Hardlock Nut. Employing the wedge principle, the HLS is ideal for preventing loosening due to severe vibration and impact load, and can be reused without reduction in performance.
The HLB Hardlock Bearing Nut demonstrates a high self-locking effect regardless of whether the concave or convex nut is tightened first since there is no effect on the perpendicular accuracy.
HLS Hardlock Set Screw ⇒ Tightening Torque Table
|
Size
|
Pitch
|
Reference tightening torque (N·m)
|
|
Concave (set) screw
|
Convex (lock) screw
|
Proof torque
|
|
M8
|
Coarse
|
10 ± 10％
|
10 ± 10％
|
16
|
|
M10
|
Coarse
|
18 ± 10％
|
18 ± 10％
|
30
|
|
M12
|
Coarse･Fine
|
30 ± 10％
|
30 ± 10％
|
52
|
|
M14
|
Coarse･Fine
|
30 ± 10％
|
30 ± 10％
|
52
|
|
M16
|
Coarse･Fine
|
70 ± 10％
|
70 ± 10％
|
120
|
|
M18
|
Coarse･Fine
|
70 ± 10％
|
70 ± 10％
|
120
|
|
M20
|
Coarse･Fine
|
100 ± 10％
|
100 ± 10％
|
220
|
|
M24
|
Coarse･Fine
|
170 ± 10％
|
170 ± 10％
|
370
|
|
M30
|
Coarse･Fine
|
590 ± 10％
|
590 ± 10％
|
980
|
|
M36
|
Coarse･Fine
|
590 ± 10％
|
590 ± 10％
|
980
|
|
Note: The concave (setting) screw can be tightened to the torque required for the target application (low or high)
|
Installation procedure and handling precautions
-
Tighten the concave (setting) screw with the torque required for the application, the convex (locking) screw requires to be tightened to a specified torque set by our company. → Tighten the concave (setting) screw with the torque required for the target application. The convex (lock) screw must be tightened to the Hardlock specified torque.
-
Please refrain from using improper tightening tools (wrong size and/or worn-out ones). If you are using improper tools, there is a risk of damage during tightening. → Refrain from using tools that are the wrong size, worn out or otherwise improper. Using such tools may result in damage during tightening.
-
The HLS should not be welded. Doing so reduces the screw strength.
-
Do not apply surface treatment or coating without guidance from Hardlock. The HLS is heat treated, and surface treatments may cause degradation in strength or hydrogen embrittlement.
Dimension and tightening torque tables
Standard Normal
Type
Standard Hollow
Type
Pin Normal
Type
Pin Hollow
Type
Special/Thin Hollow
Type
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