
| Overall length | Thread length Th | read+Neck length | Shank length | Shank dia. | Size of square | Length of square | ||||||
| O STI Spiral | Pointe | d Taps for | Helical | Coil W | ire S | crew L | Thread ℓ | Inser ℓn | ts ℓs | Ds | K | ℓk |
| Size | Class | Code | Chamfer | L (inch) | ℓ (inch) | ℓn (inch) | ℓs (inch) | Ds (inch) | K (inch) | ℓk (inch) | No. of flutes | Type |
| STI 7/16-14UNC | GH3 GH4 | PUU07Q3NEB PUU07Q4NEB | 5P | 4.331 | 1.024 | - | 2.205 | 0.429 | 0.322 | 0.5 | 3 | 3 |
| STI 7/16-20UNF | GH3 GH4 | PUU07N3NEB PUU07N4NEB | 5P | 4.331 | 1.024 | - | 2.205 | 0.429 | 0.322 | 0.5 | 3 | 3 |
| STI 1/2-13UNC | GH3 GH4 | PUU08R3NEB PUU08R4NEB | 5P | 4.331 | 1.024 | - | 2.205 | 0.480 | 0.36 | 0.562 | 3 | 3 |
| STI 1/2-20UNF | GH3 GH4 | PUU08N3NEB PUU08N4NEB | 5P | 4.331 | 1.024 | - | 2.205 | 0.480 | 0.36 | 0.562 | 3 | 3 |