
■ Suitable for stainless steels, sticky and tending to work- E harden, as well as chrome steels and chrome molybdenum steels. Blind hole use. Oxide
Alloy steels Stainless steels
For icon explanation, refer to P.50
TYPE
Segment:1D
| 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 | Y84523 | 2.5P | 6 | 0.157 | 0.437 | 0.141 | 0.11 | 0.187 | 2 | 1 |
| No.3-48UNC | GH2 | Y84500 | 2.5P | 6 | 0.197 | 0.5 | 0.141 | 0.11 | 0.187 | 2 | 1 |
| No.4-40UNC | GH2 | Y84501 | 2.5P | 6 | 0.236 | 0.562 | 0.141 | 0.11 | 0.187 | 2 | 1 |
| No.6-32UNC | GH3 | Y84505 | 2.5P | 6 | 0.276 | 0.687 | 0.141 | 0.11 | 0.187 | 3 | 1 |
| No.8-32UNC | GH3 | Y84507 | 2.5P | 6 | 0.276 | 0.75 | 0.168 | 0.131 | 0.25 | 3 | 1 |
| No.10-24UNC | GH3 | Y84509 | 2.5P | 6 | 0.354 | 0.875 | 0.194 | 0.152 | 0.25 | 3 | 1 |
| No.10-32UNF | GH3 | Y84510 | 2.5P | 6 | 0.276 | 0.875 | 0.194 | 0.152 | 0.25 | 3 | 1 |
| 1/4-20UNC | GH3 | Y84513 | 2.5P | 6 | 0.433 | 1 | 0.255 | 0.191 | 0.312 | 3 | 2 |
| 1/4-28UNF | GH3 | Y84514 | 2.5P | 6 | 0.354 | 1 | 0.255 | 0.191 | 0.312 | 3 | 2 |
| 5/16-18UNC | GH3 | Y84515 | 2.5P | 6 | 0.472 | 1.125 | 0.318 | 0.238 | 0.375 | 3 | 3 |
| 5/16-24UNF | GH3 | Y84516 | 2.5P | 6 | 0.394 | 1.125 | 0.318 | 0.238 | 0.375 | 3 | 3 |
| 3/8-16UNC | GH3 | Y84517 | 2.5P | 6 | 0.551 | 1.25 | 0.381 | 0.286 | 0.437 | 3 | 3 |
| 3/8-24UNF | GH3 | Y84518 | 2.5P | 6 | 0.394 | 1.25 | 0.381 | 0.286 | 0.437 | 3 | 3 |
| 7/16-14UNC | GH3 | Y84519 | 2.5P | 6 | 0.591 | - | 0.323 | 0.242 | 0.406 | 3 | 4 |
| 7/16-20UNF | GH3 | Y84520 | 2.5P | 6 | 0.472 | - | 0.323 | 0.242 | 0.406 | 3 | 4 |
| 1/2-13UNC | GH3 | Y84521 | 2.5P | 6 | 0.63 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |
| 1/2-20UNF | GH3 | Y84522 | 2.5P | 6 | 0.472 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |