
| Main size des | ignation and sp | ecification | |||
| ① metric | ② unified | ③ whitworth | ④ sewing screw | ⑤STI (metric) | ⑥STI (unified) |
| M8×1.25 M8×1 M8×0.75 | 5/16-18UNC 5/16-20UN 5/16-24UNF 5/16-28UN 5/16-32UNEF | W5/16-18 | STIM6×1 | STI1/4-20UNC STI1/4-28UNF | |
| M9×1.25 M9×1 | |||||
| M10×1.5 M10×1.25 M10×1 | 3/8-16UNC 3/8-20UN 3/8-24UNF 3/8-28UN | W3/8-16 | STIM8×1.25 STIM8×1 | STI5/16-18UNC STI5/16-24UNF | |
| M11×1.5 M11×1.25 M11×1 | STIM9×1.25 STIM9×1 | STI3/8-24UNF | |||
| M12×1.75 M12×1.5 M12×1.25 M12×1 | 7/16-14UNC 7/16-16UN 7/16-20UNF 7/16-28UNEF | W7/16-14 | STIM10×1.5 STIM10×1.25 STIM10×1 | STI3/8-16UNC | |
| M13×1.75 M13×1.5 M13×1.25 M13×1 | 1/2-13UNC 1/2-16UN 1/2-20UNF 1/2-28UNEF | W1/2-12 | STIM11×1.5 STIM11×1.25 | STI7/16-20UNF | |
| M14×2 | |||||
| M14×1.5 M14×1.25 | STIM12×1.5 STIM12×1.25 | STI7/16-14UNC | |||
| M14×1 | STIM12×1 | ||||
| M15×2 | 9/16-12UNC | W9/16-12 | STIM12×1.75 | ||
| M15×1.5 M15×1.25 M15×1 | 9/16-16UN 9/16-18UNF 9/16-20UN 9/16-24UNEF 9/16-28UN | STIM13×1.5 | STI1/2-20UNF | ||
| M16×2 M16×1.5 | 5/8-11UNC 5/8-12UN 5/8-16UN 5/8-18UNF | W5/8-11 | STIM13×1.75 STIM14×1.5 | STI1/2-13UNC | |
| M16×1.25 M16×1 | 5/8-20UN 5/8-24UNEF 5/8-28UN | STIM14×1.25 | |||
| STIM14×2 | |||||
| M17×1.5 | STI9/16-18UNF | ||||
| M18×2.5 | |||||
| M18×2 | STI9/16-12UNC | ||||
| M18×1.5 M18×1.25 | STIM16×1.5 | STI5/8-18UNF |