
■ ZELX FR LHSP, spiral fluted tap, through hole use (with LH E Coating spiral flutes ) is applicable for such high speed tapping as 15m/min to 25m/min. Under low tapping speed, chip shape and chip ejection may become poor and cause tapping Recommended Tapping Speed depending on Materials troubles. ow carbon steels Medium carbon steels
For icon explanation, refer to P.50
Segment:1S
| Size | Class | Code | Chamfer | L | ℓ | ℓn | Ds | K | ℓk | No. of | Type |
| (inch) | (inch) | (inch) | (inch) | (inch) | (inch) | flutes |
For Unified Threads
| No.4-40UNC | GH2 | Y84201 | 5P | 1.875 | 0.335 | 0.562 | 0.141 | 0.11 | 0.187 | 3 | 1 |
| No.5-40UNC | GH2 | Y84203 | 5P | 1.937 | 0.374 | 0.625 | 0.141 | 0.11 | 0.187 | 3 | 1 |
| No.6-32UNC | GH3 | Y84205 | 5P | 2 | 0.413 | 0.687 | 0.141 | 0.11 | 0.187 | 3 | 1 |
| No.8-32UNC | GH3 | Y84207 | 5P | 2.125 | 0.453 | 0.75 | 0.168 | 0.131 | 0.25 | 3 | 1 |
| No.10-24UNC | GH3 | Y84209 | 5P | 2.375 | 0.531 | 0.875 | 0.194 | 0.152 | 0.25 | 3 | 1 |
| No.10-32UNF | GH3 | Y84210 | 5P | 2.375 | 0.531 | 0.875 | 0.194 | 0.152 | 0.25 | 3 | 1 |
| 1/4-20UNC | GH3 | Y84213 | 4.5P | 2.5 | 0.591 | 1 | 0.255 | 0.191 | 0.312 | 3 | 2 |
| 1/4-28UNF | GH3 | Y84214 | 4.5P | 2.5 | 0.591 | 1 | 0.255 | 0.191 | 0.312 | 3 | 2 |
| 5/16-18UNC | GH3 | Y84215 | 4.5P | 2.718 | 0.669 | 1.125 | 0.318 | 0.238 | 0.375 | 3 | 3 |
| 5/16-24UNF | GH3 | Y84216 | 4.5P | 2.718 | 0.669 | 1.125 | 0.318 | 0.238 | 0.375 | 3 | 3 |
| 3/8-16UNC | GH3 | Y84217 | 4.5P | 2.937 | 0.748 | 1.25 | 0.381 | 0.286 | 0.437 | 3 | 3 |
| 3/8-24UNF | GH3 | Y84218 | 4.5P | 2.937 | 0.748 | 1.25 | 0.381 | 0.286 | 0.437 | 3 | 3 |
| 7/16-14UNC | GH3 | Y84219 | 4.5P | 3.156 | 0.984 | - | 0.323 | 0.242 | 0.406 | 3 | 4 |
| 7/16-20UNF | GH3 | Y84220 | 4.5P | 3.156 | 0.866 | - | 0.323 | 0.242 | 0.406 | 3 | 4 |
| 1/2-13UNC | GH3 | Y84221 | 4.5P | 3.375 | 1.142 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |
| 1/2-20UNF | GH3 | Y84222 | 4.5P | 3.375 | 0.945 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |
| 5/8-11UNC | GH3 | Y84225 | 4.5P | 3.812 | 1.26 | - | 0.48 | 0.36 | 0.562 | 3 | 4 |
| 5/8-18UNF | GH3 | Y84226 | 4.5P | 3.812 | 0.984 | - | 0.48 | 0.36 | 0.562 | 3 | 4 |
| 3/4-10UNC | GH3 | Y84227 | 4.5P | 4.25 | 1.467 | - | 0.59 | 0.422 | 0.687 | 4 | 4 |
| 3/4-16UNF | GH3 | Y84228 | 4.5P | 4.25 | 1.142 | - | 0.59 | 0.422 | 0.687 | 4 | 4 |