Whitworth & British
Whitworth Fine Thread 1
British threads based on Whitworth's 55° profile with rounded crests and roots, still found on older machinery, pipe fittings and model engineering.
- Standard
- DIN 239
- Flank angle
- 55°
- Sizes listed
- 91
- Range
- W 56 x 1/4" – W 499 x 1/4"
| Thread Size | Bolt Diameter mm | Nut Diameter mm | TPI | Pitch mm |
|---|---|---|---|---|
| W 56 x 1/4" | 55.00 | 56.00 | 4 | 6.35 |
| W 60 x 1/4" | 59.00 | 60.00 | 4 | 6.35 |
| W 64 x 1/4" | 63.00 | 64.00 | 4 | 6.35 |
| W 68 x 1/4" | 67.00 | 68.00 | 4 | 6.35 |
| W 72 x 1/4" | 71.00 | 72.00 | 4 | 6.35 |
| W 76 x 1/4" | 75.00 | 76.00 | 4 | 6.35 |
| W 80 x 1/4" | 79.00 | 80.00 | 4 | 6.35 |
| W 84 x 1/4" | 83.00 | 84.00 | 4 | 6.35 |
| W 89 x 1/4" | 88.00 | 89.00 | 4 | 6.35 |
| W 94 x 1/4" | 93.00 | 94.00 | 4 | 6.35 |
| W 99 x 1/4" | 98.00 | 99.00 | 4 | 6.35 |
| W 104 x 1/4" | 103.00 | 104.00 | 4 | 6.35 |
| W 109 x 1/4" | 108.00 | 109.00 | 4 | 6.35 |
| W 114 x 1/4" | 113.00 | 114.00 | 4 | 6.35 |
| W 119 x 1/4" | 118.00 | 119.00 | 4 | 6.35 |
| W 124 x 1/4" | 123.00 | 114.00 | 4 | 6.35 |
| W 129 x 1/4" | 128.00 | 129.00 | 4 | 6.35 |
| W 134 x 1/4" | 133.00 | 134.00 | 4 | 6.35 |
| W 139 x 1/4" | 138.00 | 139.00 | 4 | 6.35 |
| W 144 x 1/4" | 143.00 | 144.00 | 4 | 6.35 |
| W 149 x 1/4" | 148.00 | 149.00 | 4 | 6.35 |
| W 154 x 1/4" | 153.00 | 154.00 | 4 | 6.35 |
| W 159 x 1/4" | 158.00 | 159.00 | 4 | 6.35 |
| W 164 x 1/4" | 163.00 | 164.00 | 4 | 6.35 |
| W 169 x 1/4" | 168.00 | 169.00 | 4 | 6.35 |
| W 174 x 1/4" | 173.00 | 174.00 | 4 | 6.35 |
| W 179 x 1/4" | 178.00 | 179.00 | 4 | 6.35 |
| W 184 x 1/4" | 183.00 | 184.00 | 4 | 6.35 |
| W 189 x 1/4" | 188.00 | 189.00 | 4 | 6.35 |
| W 194 x 1/4" | 193.00 | 194.00 | 4 | 6.35 |
| W 199 x 1/4" | 198.00 | 199.00 | 4 | 6.35 |
| W 204 x 1/4" | 203.00 | 204.00 | 4 | 6.35 |
| W 209 x 1/4" | 208.00 | 209.00 | 4 | 6.35 |
| W 214 x 1/4" | 213.00 | 214.00 | 4 | 6.35 |
| W 219 x 1/4" | 218.00 | 219.00 | 4 | 6.35 |
| W 224 x 1/4" | 223.00 | 224.00 | 4 | 6.35 |
| W 229 x 1/4" | 228.00 | 229.00 | 4 | 6.35 |
| W 234 x 1/4" | 233.00 | 234.00 | 4 | 6.35 |
| W 239 x 1/4" | 238.00 | 239.00 | 4 | 6.35 |
| W 244 x 1/4" | 243.00 | 244.00 | 4 | 6.35 |
| W 249 x 1/4" | 248.00 | 249.00 | 4 | 6.35 |
| W 254 x 1/4" | 253.00 | 254.00 | 4 | 6.35 |
| W 259 x 1/4" | 258.00 | 259.00 | 4 | 6.35 |
| W 264 x 1/4" | 263.00 | 264.00 | 4 | 6.35 |
| W 269 x 1/4" | 268.00 | 269.00 | 4 | 6.35 |
| W 274 x 1/4" | 273.00 | 274.00 | 4 | 6.35 |
| W 279 x 1/4" | 278.00 | 279.00 | 4 | 6.35 |
| W 284 x 1/4" | 283.00 | 284.00 | 4 | 6.35 |
| W 289 x 1/4" | 288.00 | 289.00 | 4 | 6.35 |
| W 294 x 1/4" | 293.00 | 294.00 | 4 | 6.35 |
| W 299 x 1/4" | 298.00 | 299.00 | 4 | 6.35 |
| W 304 x 1/4" | 303.00 | 304.00 | 4 | 6.35 |
| W 309 x 1/4" | 308.00 | 309.00 | 4 | 6.35 |
| W 314 x 1/4" | 313.00 | 314.00 | 4 | 6.35 |
| W 319 x 1/4" | 318.00 | 319.00 | 4 | 6.35 |
| W 324 x 1/4" | 323.00 | 324.00 | 4 | 6.35 |
| W 329 x 1/4" | 328.00 | 329.00 | 4 | 6.35 |
| W 334 x 1/4" | 333.00 | 334.00 | 4 | 6.35 |
| W 339 x 1/4" | 338.00 | 339.00 | 4 | 6.35 |
| W 344 x 1/4" | 343.00 | 344.00 | 4 | 6.35 |
| W 349 x 1/4" | 348.00 | 349.00 | 4 | 6.35 |
| W 354 x 1/4" | 353.00 | 354.00 | 4 | 6.35 |
| W 359 x 1/4" | 358.00 | 359.00 | 4 | 6.35 |
| W 364 x 1/4" | 363.00 | 364.00 | 4 | 6.35 |
| W 369 x 1/4" | 368.00 | 369.00 | 4 | 6.35 |
| W 374 x 1/4" | 373.00 | 374.00 | 4 | 6.35 |
| W 379 x 1/4" | 378.00 | 379.00 | 4 | 6.35 |
| W 384 x 1/4" | 383.00 | 384.00 | 4 | 6.35 |
| W 389 x 1/4" | 388.00 | 389.00 | 4 | 6.35 |
| W 394 x 1/4" | 393.00 | 394.00 | 4 | 6.35 |
| W 399 x 1/4" | 398.00 | 399.00 | 4 | 6.35 |
| W 404 x 1/4" | 403.00 | 404.00 | 4 | 6.35 |
| W 409 x 1/4" | 408.00 | 409.00 | 4 | 6.35 |
| W 414 x 1/4" | 413.00 | 414.00 | 4 | 6.35 |
| W 419 x 1/4" | 418.00 | 419.00 | 4 | 6.35 |
| W 424 x 1/4" | 423.00 | 424.00 | 4 | 6.35 |
| W 429 x 1/4" | 428.00 | 429.00 | 4 | 6.35 |
| W 434 x 1/4" | 433.00 | 434.00 | 4 | 6.35 |
| W 439 x 1/4" | 438.00 | 439.00 | 4 | 6.35 |
| W 444 x 1/4" | 443.00 | 444.00 | 4 | 6.35 |
| W 449 x 1/4" | 448.00 | 449.00 | 4 | 6.35 |
| W 454 x 1/4" | 453.00 | 454.00 | 4 | 6.35 |
| W 459 x 1/4" | 458.00 | 459.00 | 4 | 6.35 |
| W 464 x 1/4" | 463.00 | 464.00 | 4 | 6.35 |
| W 469 x 1/4" | 468.00 | 469.00 | 4 | 6.35 |
| W 474 x 1/4" | 473.00 | 474.00 | 4 | 6.35 |
| W 479 x 1/4" | 478.00 | 479.00 | 4 | 6.35 |
| W 484 x 1/4" | 483.00 | 484.00 | 4 | 6.35 |
| W 489 x 1/4" | 488.00 | 489.00 | 4 | 6.35 |
| W 494 x 1/4" | 493.00 | 494.00 | 4 | 6.35 |
| W 499 x 1/4" | 498.00 | 499.00 | 4 | 6.35 |
Reference values only. Verify against the current edition of the governing standard before use in production drawings or manufacturing. Provided by Micro Components as a free engineering resource.