Loosening prevention feature + disc spring + loosening prevention nut that improves work efficiency.
The "Washer-attached U-NUT" is a locking nut that accommodates loose holes and blind holes due to its large washer diameter. In response to requests from various sources, we have integrated a large washer into the hexagonal shape of the U-NUT. Since the nut, spring washer, and washer are all integrated, it reduces labor, improves work efficiency, and minimizes the risk of forgetting to install parts as well as the hassle of inventory management. 【Features】 〇 Galvanized (SS400) ○ Stainless steel (SUS304) ○ No need for spring washers or flat washers ○ Usable with anchor bolts ○ Thread pitch is standard For more details, please contact us or download the catalog.
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basic information
【Specifications】 ○ Nut body material: SUS304 ○ Friction ring material: SUS301 ○ Disc spring washer material: SUS304 ○ Nominal diameter: M6 (in development), M8, M10, M12, M16 (in development) ○ Pitch: −, 1.25, 1.5, 1.75, − ○ Width across flats → Reference dimensions: −, 13, 17, 19, − → Tolerance: −, 0 -0.25, 0 -0.25, 0 -0.35, − ○ Seat diameter → Reference dimensions: −, 20, 24, 28, − → Tolerance: 0 -0.4 ○ Overall height → Reference dimensions: −, 9.2, 10.6, 13.2, − → Tolerance: ±0.5 ○ U-NUT height approx.: −, 7.3, 8.3, 10.5, − ○ Diagonal approx.: −, 15.0, 19.6, 21.9, − ○ Flange thickness approx.: −, 1.0, 1.8, 2.2, − ○ Weight (g) approx.: −, 7.9, 14.6, 21.5, − ● For more details, please contact us or download the catalog.
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Applications/Examples of results
【Applications】 ○ Measures to prevent loosening of anchors ○ Fixing various cable support brackets ○ Installation work for tunnel lighting ○ Installation of piping fixtures ○ Areas where surface protection of the clamped object is necessary ● For more details, please contact us or download the catalog.
CAD data（64）
| Model number | overview | File |
|---|---|---|
| CU_SS_Molten Zinc Coating | IGS data |
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| CU_SUS | sldprt data |
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| U_SC | IGS data |
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| U_SC | sldprt data |
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| FUN_SS | sldpr data |
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| FUN_SUS | sldpr data |
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| BLU_SUS | IGS data |
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| BLU_SUS | sldprt data |
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| GU_SS | IGS data |
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| GU_SS | sldprt data |
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| SU_SUS | IGS data |
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| SU_SUS | sldprt data |
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| TFU_SC | sldprt data |
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| TFU_SC | IGS data |
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| WU_SC | sldprt data |
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| WU_SC | IGS data |
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| WU_SS | sldprt data |
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| WU_SS | IGS data |
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| WU_SUS | sldprt data |
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| U_SS | IGS data |
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| U_SS | sldprt data |
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| U_SUS | IGS data |
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| U_SUS | sldprt data |
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| U_3 types_SC | sldprt data |
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| U_3 types_SC | IGS data |
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| U_3 types_SS | sldprt data |
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| U_3 types_SS | IGS data |
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| U_3 types_SUS | sldprt data |
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| U_3 types_SUS | IGS data |
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| FLANGE_SUS | IGS data |
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| UNC_SC | sldprt data |
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| UNC_SC | IGS data |
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| UNC_SS | sldprt data |
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| UNC_SS | IGS data |
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| WU_SUS | IGS data |
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| WELD_SS | sldprt data |
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| WELD_SS | IGS data |
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| CAP_SS | sldprt data |
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| CAP_SS | IGS data |
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| CAP_SUS | sldprt data |
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| CAP_SUS | IGS data |
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| FLANGE_SC | sldprt data |
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| FLANGE_SC | IGS data |
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| FLANGE_SUS | sldprt data |
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| Small U_SC | sldprt data |
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| Small U_SC | IGS data |
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| Small U_SS | sldprt data |
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| Small U_SS | IGS data |
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| Small U_SUS | sldprt data |
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| FUN_SC | IGS data |
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| FUN_SS | IGS data |
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| FUN_SUS | IGS data |
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| FUN_SC | sldpr data |
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| CU_SS_Molten Zinc Coating | sldprt data |
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| CU_SUS | IGS data |
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| FLANGE_SS | sldprt data |
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| FLANGE_SS | IGS data |
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| UNC_SUS | sldprt data |
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| UNC_SUS | IGS data |
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| Seat cushion with attachment_SS | sldprt data |
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| Seat cushion with payment_SS | IGS data |
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| Seat with metal base_SUS | sldprt data |
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| Seat with metal base_SUS | IGS data |
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| Small U_SUS | IGS data |
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Company information
Since our establishment in 1962, Fuji Precision has focused exclusively on the research and development of locking nuts, growing into a comprehensive manufacturer of locking nuts. The 'U-Nut' brand was the first in the industry to introduce the "metal ring locking function" to bolts and nuts, which were traditionally considered prone to loosening. This groundbreaking product received a significant response upon its release and has now grown to capture a 50% share of the domestic market, becoming synonymous with locking nuts. Although bolts and nuts may be considered small parts, they play a crucial role in connecting functions and technologies. They can be described as cross-point technology that combines cutting-edge technologies and opens up new technological fields. Fuji Precision regards this theme as an eternal proposition and has been committed to product development that anticipates the needs of the times, while pursuing high quality and high added value in our products. Our future goal is to become the world's number one comprehensive manufacturer of locking nuts. We will continue to strive to create products that meet your trust and contribute to the industrial sector and society.