FSW U-NUT
An integrated the FUJILOK U-NUT and washer unit
Features
- An integrated the FUJILOK U-NUT and washer unit
- Reduces the number of components
- Makes construction easy and reduces costs
- Can also be used for anchor bolts
- Protects the surface treatment of the object the nut is being fastened onto
- Suitable for slotted holes and clearance holes
- Vibration impact tested in accordance with NAS3350
General names
Washer nut
Video of features
Applicable markets
- Two-wheeled vehicles
- Four-wheeled vehicles
- Special-equipped vehicles
- Farm equipment
- Conveyers
- Railways
- Marine vessels
- Plants
- Machine tools
- Industrial equipment
- Electronics
- Medical care and welfare
- Infrastructure
- Civil engineering
- Architecture
- Playground equipment
Basic Information
Specs
| Applications | ・Anti-loosening measures for anchor bolts ・Fixing support brackets for various cables ・Tunnel lighting installation work ・Pipe fitting installation work |
|---|---|
| Thread accuracy | JIS6H (JIS Class 2) |
| Sizes | SS M8～M16 SUS M6～M16 *Pitch: Coarse thread |
| Materials | SS400 or equivalent, SUS304 or equivalent |
| Surface treatments | Hot-dip Galvanizing Coating(SS400 or equivalent only) |
Dimensional Charts and Reference Tightening Torque Charts
FSW U-NUT Mateial of the Nut Body SS400 Hot-dip Galvanizing Coating
Dimensional Chart and Reference Tightening Torque Chart
Thread Accuracy: JIS6H(Class 2) Unit:mm
| Material of the Nut Body | SS400 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Material of the Friction Ring | SUS301 | |||||||||||
| Material of the Washer | SPCC | |||||||||||
| Surface treatment | Hot-dip Galvanizing Coating | |||||||||||
| Nominal Diameter （d） |
Pitch （p） |
Width Across Flat (s) |
Flange Diameter (φdc) |
Overall Height (h1) |
U-NUT Height (h2) Approx. |
Across Corners (e) Approx. |
Washer Thickness (c) Approx. |
Unit Weight (g) Approx. |
Reference Tightening Torque(N･m) Bolt Strength Grade:4.8 Surface treatment: Hot-dip Galvanizing Coating |
|||
| Base | Tolerance | Base | Tolerance | Base | Tolerance | |||||||
| M8 | 1.25 | 13 | 0 -0.25 |
22 | 0 -0.52 |
9.3 | +1.0 -0.5 |
7.3 | 15.0 | 2.0 | 9.2 | 23.0 |
| M10 | 1.5 | 17 | 26 | 10.8 | 8.3 | 19.6 | 2.5 | 17.6 | 45.0 | |||
| M12 | 1.75 | 19 | 0 -0.35 |
32 | 0 -0.62 |
13.5 | 10.5 | 21.9 | 3.0 | 29.3 | 79.0 | |
| M16 | 2 | 24 | 38 | 17.5 | 14.5 | 27.7 | 3.0 | 50.6 | 195.0 | |||
FSW U-NUT Mateial of the Nut Body SUS304
Dimensional Chart and Reference Tightening Torque Chart
Thread Accuracy: JIS6H(Class 2) Unit:mm
| Material of the Nut Body/Material of the Washer | SUS304 | Reference Tightening Torque(N･m) | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Material ofthe Friction Ring | SUS301 | Bolt | ||||||||||||
| Nominal Diameter （d） |
Pitch （p） |
Width Across Flat (s) |
Flange Diameter (φdc) |
Overall Height (h1) |
U-NUT Height (h2) Approx. |
Across Corners (e) Approx. |
Washer Thickness (c) Approx. |
Unit Weight (g) Approx. |
Stainless Steel Proof Stress 300N/㎟ |
Strength Grade 50 210N/㎟ |
Strength Grade 70 450N/㎟ |
|||
| Base | Tolerance | Base | Tolerance | Base | Tolerance | |||||||||
| M6 | 1 | 10 | 0 -0.2 |
17 | 0 -0.4 |
6.5 | ±0.4 | 5.1 | 11.5 | 1.0 | 3.5 | 6.5 | 4.6 | 9.8 |
| M8 | 1.25 | 13 | 0 -0.25 |
20 | 9.2 | ±0.5 | 73.0 | 15.0 | 1.4 | 7.9 | 16.0 | 11.0 | 24.0 | |
| M10 | 1.5 | 17 | 24 | 10.6 | 83.0 | 19.6 | 1.8 | 14.6 | 31.0 | 22.0 | 47.0 | |||
| M12 | 1.75 | 19 | 0 -0.35 |
28 | 13.5 | 10.5 | 21.9 | 2.3 | 21.5 | 55.0 | 38.0 | 82.0 | ||
| M16 | 2 | 24 | 34 | 0 -0.5 |
18.0 | ±0.6 | 14.5 | 27.7 | 2.5 | 45.6 | 135.0 | 95.0 | 205.0 | |
Please feel free to contact us for sizes, shapes, and materials that are not listed.
Surface treatments
Precautions for Use
This product is used for fastening parts that are especially important.
Please observe the following rules when using this product.
-
Use bolts that have a chamfered tip with JIS6g (Class 2) thread accuracy.
-
Please refer to the reference tightening torque chart when tightening nuts.
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Use lubricant if there is a risk of galling or sticking when screwing on or unscrewing nuts.
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To fully demonstrate the locking function of the FUJILOK U-NUT, make sure that at least two full bolt threads come out of the friction ring.
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Consult us if you are working with bolts with threads that have been machined (with keyways, pin holes, etc.).
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Use impact wrenches at a medium or lower rotating speed.
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The nut cannot be screwed on from the friction ring side.
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Stop using the FUJILOK U-NUT if abnormal deformation or other faults occur on the friction ring and clamp.
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Consult us before using the FUJILOK U-NUT under severe conditions or with low axial force.