Whitworth Thread Type U-NUT
55° thread angle Compatible with old British standards
Features
- 55° thread angle
General names
Inch screw, Bu (old Japanese unit of measurement) screw, Whitworth
Video of features
Dimensional Charts
Whitworth Thread Type U-NUT Dimensional Chart
●Available
Thread Accuracy: formerly JIS Class2 Unit:mm
| Material of the Nut Body | SS400 | S45C (thermal refined) | SUS304 | Unit Weight (g) Approx. |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Material of the Friction Ring | SUS301 | ||||||||||||
| Nominal Diameter -Number of threads |
Width Across Flat (s) |
Across Corners (e) Approx. |
Overall Height (h) |
Thread Height (m) Approx. |
Single Chamfer (Type 1) |
Double Chamfer (Type 2) |
Double Chamfer (Type 2) |
Single Chamfer (Type 1) |
|||||
| Base | Tolerance | Base | Tolerance | ||||||||||
| W3/16-24 | 9 | 0 -0.2 |
10.4 | 4.1 | ±0.3 | 3.3 | ● | 1.4 | |||||
| W1/4-20 | 10 | 11.5 | 5.1 | 4.2 | ● | ● | 2.1 | ||||||
| W5/16-18 | 14 | 0 -0.25 |
16.2 | 7.3 | ±0.4 | 5.9 | ● | ● | 6.3 | ||||
| W3/8-16 | 17 | 19.6 | 8.3 | 6.9 | ● | ● | ● | 10.6 | |||||
| W7/16-14 | 19 | 0 -0.35 |
21.9 | 10.0 | 8.3 | ● | 15.3 | ||||||
| W1/2-12 | 21 | 24.2 | 10.5 | 9.0 | ● | ● | ● | 19.1 | |||||
| W5/8-11 | 26 | 30.0 | 14.8 | ±0.5 | 13.0 | ● | ● | ● | 40.8 | ||||
| W3/4-10 | 32 | 0 -0.4 |
37.0 | 16.0 | 14.0 | ● | ● | 69.6 | |||||
| 18.1 | 16.0 | ● | 72.6 | ||||||||||
| W7/8-9 | 35 | 40.4 | 18.5 | ±0.6 | 15.8 | ● | ● | ● | 91.0 | ||||
| W1"-8 | 41 | 47.3 | 22.5 | 20.0 | ● | ● | ● | 154.1 | |||||
Please feel free to contact us for sizes, shapes, and materials that are not listed.