Fuji Seimitsu
Fuji Seimitsu Co., Ltd. is a comprehensive manufacturer of self-locking nuts with industry-first metal ring locking capability. Fine U-NUTs are self-locking nuts developed for fastening bearings used in particularly harsh environments. Key groove processing on the shaft is not required, increasing "rationality" and "safety" of work processes. Even easier mounting gives excellent "workability". Increased performance of various machinery products, higher product quality and lighter weight has led to "safe" and "reliable" products with a great reputation.
Fine U-Nut - Stainless Steel Equivalent (Fuji Seimitsu)
Fuji Seimitsu
The Locknut with the stainless steel insert
FUJILOK U-NUT was a groundbreaking Locknut introduced by Fuji Seimitsu as the first in the industry to feature a metal ring locking function. FUJILOK U-NUT sparked a revolution in the area of bolts and nuts where up until that point loosening had been considered unavoidable. It has passed over 50 years since the birth. FUJILOK U-NUT is now the highly regarded as the first name in Locknuts across all industries from steel structures such as railways and connecting bridges to automobiles, motorcycles, and on up to industrial machines.
FineU-Nut pdf
FUJILOK U-NUT
It has passed over 50 years since the birth. FUJILOK U-NUT is now the highly regarded as the first name in Locknuts across all industries from steel structures such as railways and connecting bridges to automobiles, motorcycles, and on up to industrial machines. No matter how harsh the use environment is, the FUJILOK U-NUT which is required for safety and peace of mind is the definitive version of the locking nut which continues to evolve in terms of durability, vibration resistance, etc. as well as locking performance.
Line-up
- Hex Single Chamfer
- Hex Double Chamfer
- Hex Thin Type
- Small Type
- Cap Type
- Flange Type
- Weld Type
- Whit Threads
- Unified Threads
GU-NUT
The GU-NUT was developed to further improve upon the safety and peace of mind provided with the FUJILOK U-NUT and to create the lock nut standard for the next generation. The shape of the 270° high torque type friction ring (specialized spring) provides an even better locking function.
Basic Information
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Features
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・ The FUJILOK U-NUT locking function is strengthened.
・ Prevents nuts from quickly coming off even if the axial force is lowered.
・ An all-metal product that has excellent resistance to heat and low temperatures.
・ Easy tightening prevents installation mistakes.
・ Can be reused.
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Size
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Size：M8～M16 ※Pitch：Coarse Thread ※Other special size
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Stainless Spring Steel Friction Ring
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270° friction ring
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Shape
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Single Chamfer(one side) Nut、Double Chamfer(both side) Nut
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Accuracy
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Thread Accuracy：JIS 6H （Old JIS class 2）
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Material
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SS400 or equivalent、SUS304 or equivalent
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CLIP U-NUT
"CLIP U-NUT" is combined with the "FUJILOK U-NUT" and metal clip. This simplifies the application, especially in areas with limited access and a confined working space. By simply making a hole in the mating component ( no welding of nut necessary) and applying the CLIP U-NUT , considerable time is saved and overall reduced cost of the application.
Basic Information
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FEATURES
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・It's a clip nut with FUJILOK U-NUT benefits and features.
・FUJILOK U-NUT prevents the bolt from loosening.
・Just by making a hole in the mating component- no need to weld the nut.
・Guide ring - function makes positioning easy.
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SIZE
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M6～M16 ※PITCH：COARSE THREAD ※OTHER SPECIAL SIZES
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MEATL FRICTION RING
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60°3-wing ring structure (M6)
90°2-wing ring structure (M8～)
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SHAPE
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Single Chamfer(one side) Nut Double Chamfer(both side) Nut ※OTHER SPECIAL SIZE
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ACCURACY
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THREAD ACCURACY ：JIS6H（ISO6H）
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MATERIAL
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SUS304 or EQUIVALENT、SS400 or EQUIVALENT
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BLU-NUT
R & D Product- we have added the FUJILOK U-Nut's functions & capabilities to a blind nut. To meet increasing customer demand and to improve application requirements, we have added the FUJILOK U-NUT's highly rated capabilities and functions to a blind nut and as a result , BLU-NUT will not only improve the application quality but be much more cost effective. We are seeking companies who may be interested in further developing this fastener method.
Basic Information
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Features
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・Reduced working hours and labour costs.
・Easy application with a special tool.
・Significant overall cost reduction.
・Easier parts management-reduced number of parts needed.
・Corotation of the nut and siezure of the bolt is prevented by this method.
・As this is a progressive R & D situation, the method can be specifically adjusted to customer requirements.
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Applications
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・Vehicles, Accessories of Trucks, Motocycles, Automobiles, Industrial Machineries, Building Materials, External Plates, Etc...
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Delivery Record
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・It was used for Aluminum Curtatin Wall.（Item No.: BLU-NUT-08-2535）
・When researching and developing this product, our testing proved most adequate within the requirements of the nut's corotation, scorching and seizing parameters.
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Customer Feedback
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・ " In the past we used the FUJILOK U-NUT as a back nut by welding it to a square washer - this new method allows a much quicker application "
・ " Our application time and wasted hours dealing with corotation and seizing is now eliminated "
・ " We adopted the BLU-Nut and experienced a significant cost reduction from the procurement of materials, application timing and the management of the job at hand "
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SU-NUT
Adopted by outdoor facilities such as MEGA SOLAR SYSTEMS for increased protection & security.
We have received many enquiries for an SU-NUT type product to increase protection of equipment and installations from damage & theft. Key facilities such as the Mega Solar System operations are a good example of the type of structures being set up in Japan. The SU-NUT special design works as a visual crime deterrent and also the special tool requirement greatly minimises any attempts to tamper with valuable equipment. We also control the use of the tool by arrangement of a free supply agreement with approved customers thereby further increasing the securty aspect.
Basic Information
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Features
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・Protecting your Companies valuable equipment and property.
・Can replace an existing installation whereby security is vulnerable. · Function and quality is the same as FUJILOK U-NUT.
・Easy to apply & use as the special tool is the socket only
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Applications
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· ANTI-THEFT: Solar Panel, Steel Tower, Road Sign, Guardrail, Marine Equipment, Outdoor Signboard, Vending Machine, Surveillance Camera.
· ANTI-TAMPER: Nameplate, Amusement Equipment, Public Facilities (toilet), Hotel Equipment.
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FUJILOK U-NUT with FREE SPINNING WASHER
SPECIFICATION: SS400 ・ HOT DIP GALVANIZING
SPECIFICATION: SUS304 ・ FUN COAT (stainless lubrication oil)
To meet requests from various customers, we combined the FUJILOK U-NUT with a free spinning washer. Being a free spinning washer, the mating surface is not damaged.
FUJILOK U-NUT with FREE SPINNING WASHER enables reduced assembling operation time and improves efficiency. This one-part combination means reduced inventory and cost control.
FLANGE TYPE FUJILOK U-NUT in STAINLESS STEEL
We manufactured FLANGE TYPE FUJILOK U-NUT in STAINLESS STEEL mainly used for motorcycles.
FLANGE TYPE FUJILOK U-NUT in STAINLESS STEEL in coarse thread can improves the workability for constructions in public works, construction buildings, railways and bridges, and installation works for solar panels.
Also, this is appropriate for exteriors when you care about the appearance.
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Manufacturer
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Part No: |
| Fuji Seimitsu |
FUN00SS |
| Fuji Seimitsu |
FUN01SS |
| Fuji Seimitsu |
FUN02SS |
| Fuji Seimitsu |
FUN03SS |
| Fuji Seimitsu |
FUN04SS |
| Fuji Seimitsu |
FUN05SS |
| Fuji Seimitsu |
FUN06SS |
| Fuji Seimitsu |
FUN07SS |
| Fuji Seimitsu |
FUN08SS |
| Fuji Seimitsu |
FUN09SS |
| Fuji Seimitsu |
FUN10SS |
| Fuji Seimitsu |
FUN11SS |
| Fuji Seimitsu |
FUN12SS |
| Fuji Seimitsu |
FUN13SS |
| Fuji Seimitsu |
FUN14SS |
| Fuji Seimitsu |
FUN15SS |
| Fuji Seimitsu |
FUN16SS |
| Fuji Seimitsu |
FUN17SS |
| Fuji Seimitsu |
FUN18SS |
| Fuji Seimitsu |
FUN19SS |
Basic Information
| Manufacturer |
Type
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Lock Nut
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Shape
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Round shape
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Material
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1018 Carbon Steel (SS400 Equivalent) |
| Fuji Seimitsu |
Surface Treatment |
No Surface Treatment |
Screw Type |
Metric (fine) Thread |
Socket for Fine U Nut (Fuji Seimitsu)
Fuji Seimitsu
| Manufacturer |
Part No |
| Fuji Seimitsu |
FUT#01 |
| Fuji Seimitsu |
FUT#02 |
| Fuji Seimitsu |
FUT#03 |
| Fuji Seimitsu |
FUT#04 |
| Fuji Seimitsu |
FUT#05 |
| Fuji Seimitsu |
FUT#06 |
| Fuji Seimitsu |
FUT#07 |
| Fuji Seimitsu |
FUT#08 |
| Fuji Seimitsu |
FUT#10 |
Fine U-Nut - S45C Equivalent, SC Series (Fuji Seimitsu)
Fuji Seimitsu
| Manufacturer |
Part No |
| Fuji Seimitsu |
FUN02SC |
| Fuji Seimitsu |
FUN03SC |
| Fuji Seimitsu |
FUN04SC |
| Fuji Seimitsu |
FUN05SC |
| Fuji Seimitsu |
FUN06SC |
| Fuji Seimitsu |
FUN07SC |
| Fuji Seimitsu |
FUN08SC |
| Fuji Seimitsu |
FUN09SC |
| Fuji Seimitsu |
FUN10SC |
| Fuji Seimitsu |
FUN11SC |
| Fuji Seimitsu |
FUN12SC |
| Fuji Seimitsu |
FUN13SC |
| Fuji Seimitsu |
FUN14SC |
| Fuji Seimitsu |
FUN15SC |
| Fuji Seimitsu |
FUN16SC |
| Fuji Seimitsu |
FUN17SC |
| Fuji Seimitsu |
FUN18SC |
| Fuji Seimitsu |
FUN19SC |
Basic Information
| Manufacturer |
Type
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Lock Nut
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Shape
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Round shape
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Material
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1045 Carbon Steel Equivalent
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| Fuji Seimitsu |
Surface Treatment
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No Surface Treatment
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Screw Type
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Metric (fine) Thread
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Fine U-Nut - Stainless Steel SUS304 (Fuji Seimitsu)
Fuji Seimitsu
| Manufacturer |
Part No |
| Fuji Seimitsu |
FUN00SUS
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| Fuji Seimitsu |
FUN01SUS
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| Fuji Seimitsu |
FUN02SUS
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| Fuji Seimitsu |
FUN03SUS
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| Fuji Seimitsu |
FUN04SUS
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| Fuji Seimitsu |
FUN05SUS
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| Fuji Seimitsu |
FUN06SUS
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| Fuji Seimitsu |
FUN07SUS
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| Fuji Seimitsu |
FUN08SUS
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| Fuji Seimitsu |
FUN09SUS
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| Fuji Seimitsu |
FUN10SUS
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| Fuji Seimitsu |
FUN11SUS
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| Fuji Seimitsu |
FUN12SUS
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| Fuji Seimitsu |
FUN13SUS
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| Fuji Seimitsu |
FUN14SUS
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| Fuji Seimitsu |
FUN15SUS
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| Fuji Seimitsu |
FUN16SUS
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| Fuji Seimitsu |
FUN17SUS
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| Fuji Seimitsu |
FUN18SUS
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| Fuji Seimitsu |
FUN19SUS
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Basic Information
| Manufacturer |
Type
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Lock Nut
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Shape
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Round shape
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Material
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304 Stainless Steel
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| Fuji Seimitsu |
Surface Treatment
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No Surface Treatment
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Screw Type
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Metric (fine) Thread
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TWIN FU-NUT (Fuji Seimitsu)
Fuji Seimitsu
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TFU02SC-15-S45C
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TFU03SC-17-S45C
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TFU04SC-20-S45C
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TFU05SC-25-S45C
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TFU06SC-30-S45C
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TFU07SC-35-S45C
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TFU08SC-40-S45C
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TFU09SC-45-S45C
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TFU10SC-50-S45C
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Basic Information
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Type
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Lock Nut
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Shape
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Round shape
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Material
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Steel
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Surface Treatment
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Zinc Phosphate Coating Treatment
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Screw Type
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Metric (fine) Thread
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FINE U-NUT
Fastening revolution for bearings.
With FINE U-NUT, variable positioning at the appropriate location is possible and torque management is also easy. This groundbreaking lock nut for use with bearings makes unnecessary of machining key ways on shafts, lockwashers, and a high degree of skill for installation. FINE U-NUT improves the rotational balance of bearings that provide power in all machine industries.
Twin Fu Nut pdf
FINE U-NUT
With FINE U-NUT, unlike lockwasher, variable positioning at the appropriate location is possible and torque management is also easy. This groundbreaking lock nut for use with bearings makes unnecessary of machining key ways on shafts, lockwashers, and a high degree of skill for installation. FINE U-NUT improves the rotational balance of bearings that provide power in all machine industries. Reduction of equipment rotation loss and reduction of power consumption are also realized.
Basic Information
|
Features
|
・ Machining of key ways on shafts is unnecessary.
・ No lockwasher is required, which removes the possibility of the lockwasher being incorrectly installed.
・ Assembly does not require a high degree of skill.
・ Fine adjustment is possible and torque management is easy.
・ Shaft rotational balance is improved.
・ Can be reused.
|
Size
|
M8～M100 (SS series)
M10～M150 (SC series)
M10～M100 (SUS series)
※Pitch: Extra fine thread
|
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Stainless Spring Steel Friction Ring
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270°Friction Ring
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Shape
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Grooved round nut ※ Other special shape
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Accuracy
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Thread Accuracy：JIS6H（Old JIS class 2）
Maximum face runout (Max.): 0.05 (M8～M50)
Maximum face runout (Max.): 0.07 (M55～M120)
Maximum face runout (Max.): 0.10 (M125～M150)
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Material
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SS400 or equivalent = low carbon steel,
S45C (heat-treated) = high carbon steel (H.T.),
SUS304 or equivalent = stainless steel 304 (A2)
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TWIN FU-NUT
Prevailing torque type precision locknut
The industry's first prevailing torque type precision locknut. The locking function of the FINE U-NUT is strengthened by having two friction rings (specialized springs).
TWIN FU-NUT
The industry's first prevailing torque type precision locknut. The locking function of the FINE U-NUT is strengthened by having two friction rings (specialized springs). Through the threads and the bearing surface being created at the same time, the TWIN FU-NUT provides both high bearing surface run-out accuracy and an excellent locking function and it always maintains accurate bearing rotation.
Basic Information
|
Features
|
・ Machining of key ways on shafts is unnecessary.
・ No lockwasher is required, which removes the possibility of the lockwasher being incorrectly installed.
・ Assembly does not require a high degree of skill.
・ Fine adjustment is possible and torque management is easy.
・ Shaft rotational balance is improved.
・ Can be reused.
|
Size
|
M8～M100 (SS series)
M10～M150 (SC series)
M10～M100 (SUS series)
※Pitch: Extra fine thread
|
|
Stainless Spring Steel Friction Ring
|
270°Friction Ring
|
Shape
|
Grooved round nut ※ Other special shape
|
|
Accuracy
|
Thread Accuracy：JIS6H（Old JIS class 2）
Maximum face runout (Max.): 0.05 (M8～M50)
Maximum face runout (Max.): 0.07 (M55～M120)
Maximum face runout (Max.): 0.10 (M125～M150)
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Material
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SS400 or equivalent = low carbon steel,
S45C (heat-treated) = high carbon steel (H.T.),
SUS304 or equivalent = stainless steel 304 (A2)
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FUJILOK BOLT N
Fuji Seimitsu's anti-loosening quality for bolts
As a comprehensive manufacturer of lock nuts, we applied high quality locking function to the bolts. By using "FUJILOK BOLT N", you will be sure the application is tight and secure.
FUJILOK BOLT N
As a comprehensive manufacturer of lock nuts, we applied high quality locking function to the bolts.
By using "FUJILOK BOLT N", you will be sure the application is tight and secure.
Fujilok bolt pdf
Basic Information
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FEATURES
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・It exerts locking function and sealing effect.
Tightening is easier and a reduced number of parts to control
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SIZE
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M5～M36 ※PITCH：COARSE THREAD
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LOCK RING
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POLYAMIDE RESIN
TYPE 66
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SHAPE
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Hexagon Headed Bolt Half Thread (A Type), Hexagon Socket Head Cap Bolt Half Thread (B Type), Hexagon Socket Head Cap Bolt Full Thread (C Type)
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ACCURACY
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THREAD ACCURACY ：JIS6H（ISO6H）
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MATERIAL
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SS400 or EQUIVALENT, SCM435H (HEAT TREADED), SUS304 or EQUIVALENT
|
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