
■ Suitable for stainless steels tending to work harden and E sticky, as well as chrome steels and molybdenum steels. Through hole use. Oxide
| ow carbon steels | Medium carbon steels | Stainless steels | |
| 5〜10 | 5〜10 | 〜5 |
For icon explanation, refer to P.50
Segment:1F
| Size | Class | Code | Chamfer | L | ℓ | ℓn | Ds | K | ℓk | No. of | Type |
| (inch) | (inch) | (inch) | (inch) | (inch) | (inch) | flutes |
For Unified Threads
| No.2-56UNC | GH2 | Y82523 | 4.5P | 6 | 0.256 | 0.437 | 0.141 | 0.11 | 0.187 | 2 | 1 |
| No.3-48UNC | GH2 | Y82500 | 4.5P | 6 | 0.295 | 0.5 | 0.141 | 0.11 | 0.187 | 2 | 1 |
| No.4-40UNC | GH2 | Y82501 | 4.5P | 6 | 0.335 | 0.562 | 0.141 | 0.11 | 0.187 | 2 | 1 |
| No.6-32UNC | GH3 | Y82505 | 4.5P | 6 | 0.413 | 0.687 | 0.141 | 0.11 | 0.187 | 3 | 1 |
| No.8-32UNC | GH3 | Y82507 | 4.5P | 6 | 0.453 | 0.75 | 0.168 | 0.131 | 0.25 | 3 | 1 |
| No.10-24UNC | GH3 | Y82509 | 4.5P | 6 | 0.531 | 0.875 | 0.194 | 0.152 | 0.25 | 3 | 1 |
| No.10-32UNF | GH3 | Y82510 | 4.5P | 6 | 0.531 | 0.875 | 0.194 | 0.152 | 0.25 | 3 | 1 |
| 1/4-20UNC | GH3 | Y82513 | 4.5P | 6 | 0.591 | 1 | 0.255 | 0.191 | 0.312 | 3 | 2 |
| 1/4-28UNF | GH3 | Y82514 | 4.5P | 6 | 0.591 | 1 | 0.255 | 0.191 | 0.312 | 3 | 2 |
| 5/16-18UNC | GH3 | Y82515 | 4.5P | 6 | 0.669 | 1.125 | 0.318 | 0.238 | 0.375 | 3 | 3 |
| 5/16-24UNF | GH3 | Y82516 | 4.5P | 6 | 0.669 | 1.125 | 0.318 | 0.238 | 0.375 | 3 | 3 |
| 3/8-16UNC | GH3 | Y82517 | 4.5P | 6 | 0.748 | 1.25 | 0.381 | 0.286 | 0.437 | 3 | 3 |
| 3/8-24UNF | GH3 | Y82518 | 4.5P | 6 | 0.748 | 1.25 | 0.381 | 0.286 | 0.437 | 3 | 3 |
| 7/16-14UNC | GH3 | Y82519 | 4.5P | 6 | 0.866 | - | 0.323 | 0.242 | 0.406 | 3 | 4 |
| 7/16-20UNF | GH3 | Y82520 | 4.5P | 6 | 0.866 | - | 0.323 | 0.242 | 0.406 | 3 | 4 |
| 1/2-13UNC | GH3 | Y82521 | 4.5P | 6 | 0.984 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |
| 1/2-20UNF | GH3 | Y82522 | 4.5P | 6 | 0.984 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |