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Disaster prevention and disaster measures! Locking nut 'U-NUT'

Since its birth over 60 years ago, the U-NUT, known for its reliability and achievements, is the industry standard for locking nuts that deliver safety and peace of mind.

The "U-NUT" is used in various disaster prevention and disaster response products that are subjected to wind and water pressure, such as seismic reinforcement work for bridges, temporary road installation work, seismic devices and lightning rods for buildings, emergency generators, fire extinguishers, shutters, vibration parts of fire doors, parabolic antennas, mounting brackets for solar panels, stop wires for tetrapods, and installation brackets for marine buoys (markers). No matter how harsh the usage environment, the "U-NUT" is required to provide safety and peace of mind. It excels not only in anti-loosening performance but also in preventing detachment and reusability, making it active in various industries. 【Features】 ■ Fastening Function: Exhibits stable anti-loosening performance ■ Detachment Prevention: Prevents early detachment even if axial force decreases ■ Reusability: Can be reused ■ Easy Fastening: No need for skilled techniques or specialized tools ■ Individual Parts: Facilitates parts management and prevents installation errors ■ Heat and Cold Resistance: All-metal products conform to the inherent heat resistance temperature of the material *For more details, please refer to the PDF document or feel free to contact us.

Fuji Precision Homepage U-TOWN

basic information

<Installation Procedure> 1. Pass the bolt through the fastening component. Ensure that the bolt has a thread accuracy of 6g (Grade 2) and that the tip of the threaded section has been chamfered. 2. Manually screw in the bolt until the friction ring makes contact with the tip of the threaded section. *Note: Screwing in from the side of the friction ring is not possible. 3. Tighten using a wrench or other fastening tool. 4. Confirm that the threaded section of the bolt extends more than two pitches from the friction ring. When removing, use a wrench or similar tool to unscrew until the friction ring is free from the bolt's threads. Once the friction ring is no longer in contact with the bolt's threads, you can unscrew by hand. *For more details, please refer to the PDF document or feel free to contact us.

Price range

Delivery Time

Model number/Brand name

"U-NUT", "U-NUT with cap", "U-NUT with washer", "CLIP U-NUT", "BL U-NUT", and others.

Applications/Examples of results

【Case Studies】 ■ Bridge seismic reinforcement work ■ Temporary road installation work ■ River disaster recovery work ■ Seismic devices for buildings ■ Lightning rods ■ Emergency generators ■ Fire extinguishers ■ Shutters ■ Fire doors ■ Tether wires for tetrapods ■ Installation of marine buoys (markers) ■ Mounting brackets for parabolic antennas ■ Mounting brackets for solar panels, etc. * These products are used in various industries and sectors related to loosening. For more details, please refer to the PDF materials or feel free to contact us.

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CAD data(64)

Model number overview File
Small U_SUS IGS data
  • 3D zip ( 117KB)
Small U_SUS sldprt data
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Small U_SS IGS data
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Small U_SS sldprt data
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Small U_SC IGS data
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Small U_SC sldprt data
  • 3D zip ( 2MB)
Seat with metal base_SUS IGS data
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Seat with metal base_SUS sldprt data
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Seat cushion with payment_SS IGS data
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Seat cushion with attachment_SS sldprt data
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UNC_SUS IGS data
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UNC_SUS sldprt data
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UNC_SS IGS data
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UNC_SS sldprt data
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UNC_SC IGS data
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UNC_SC sldprt data
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FLANGE_SUS IGS data
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FLANGE_SUS sldprt data
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FLANGE_SS IGS data
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FLANGE_SS sldprt data
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FLANGE_SC IGS data
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FLANGE_SC sldprt data
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CAP_SUS IGS data
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CAP_SUS sldprt data
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CAP_SS IGS data
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CAP_SS sldprt data
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WELD_SS IGS data
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WELD_SS sldprt data
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WU_SUS IGS data
  • 3D zip ( 252KB)
WU_SUS sldprt data
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WU_SS IGS data
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WU_SS sldprt data
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WU_SC IGS data
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WU_SC sldprt data
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U_3 types_SUS IGS data
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U_3 types_SUS sldprt data
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U_3 types_SS IGS data
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U_3 types_SS sldprt data
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U_3 types_SC IGS data
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U_3 types_SC sldprt data
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U_SUS sldprt data
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U_SUS IGS data
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U_SS sldprt data
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U_SS IGS data
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U_SC sldprt data
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U_SC IGS data
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CU_SUS sldprt data
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CU_SUS IGS data
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CU_SS_Molten Zinc Coating sldprt data
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CU_SS_Molten Zinc Coating IGS data
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TFU_SC IGS data
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TFU_SC sldprt data
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SU_SUS sldprt data
  • 3D SLDPRT ( 237KB)
SU_SUS IGS data
  • 3D IGS ( 464KB)
GU_SS sldprt data
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GU_SS IGS data
  • 3D zip ( 152KB)
BLU_SUS sldprt data
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BLU_SUS IGS data
  • 3D zip ( 221KB)
FUN_SUS sldpr data
  • 3D zip ( 8MB)
FUN_SS sldpr data
  • 3D zip ( 8MB)
FUN_SC sldpr data
  • 3D zip ( 11MB)
FUN_SUS IGS data
  • 3D zip ( 3MB)
FUN_SS IGS data
  • 3D zip ( 4MB)
FUN_SC IGS data
  • 3D zip ( 5MB)

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