
| ral Point | ed | ap | Overa length L | ll Thread length ℓ | Thread+Ne length ℓn | ck Shank dia. Ds | Size of square K | Length of square ℓk | |||
| Size ELX NI PO S | Class TI Sp | Code iral Pointed T | Chamfer aps for Ni | L (inch) ckel Ba | ℓ (inch) se Alloy | ℓn (inch) s for He | Ds (inch) lical Co | K (inch) il Wire | ℓk (inch) Screw T | No. of flutes hread I | Type nserts |
| STI 3/8-16UNC | GH3 GH4 | Y87262 Y87270 | 4.5P | 3.375 | 0.984 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |
| STI 3/8-24UNF | GH2 GH3 | Y87253 Y87263 | 4.5P | 3.156 | 0.866 | - | 0.323 | 0.242 | 0.406 | 3 | 4 |
| STI 7/16-14UNC | GH3 | Y87264 | 4.5P | 3.593 | 0.984 | - | 0.429 | 0.322 | 0.5 | 3 | 4 |
| STI 7/16-20UNF | GH3 GH4 | Y87265 Y87275 | 4.5P | 3.375 | 0.984 | - | 0.367 | 0.275 | 0.437 | 3 | 4 |
| STI 1/2-13UNC | GH3 | Y87266 | 4.5P | 3.812 | 1.083 | - | 0.48 | 0.36 | 0.562 | 3 | 4 |
| STI 1/2-20UNF | GH3 | Y87267 | 4.5P | 3.593 | 0.984 | - | 0.429 | 0.322 | 0.5 | 3 | 4 |