
| Main size | designatio | n and spec | ification | |||||
| ① metric | ② unified | L | `ℓ` | `ℓ`n | `ℓ`s (reference) | Ds | K | `ℓ`k |
| M4×0.5 | 63 | 9 | - | - | 2.8 | 2.1 | 5 | |
| M5×0.5 | 70 | 11 | - | - | 3.5 | 2.7 | 6 | |
| M6×0.75 M6×0.5 | 80 | 13 | - | - | 4.5 | 3.4 | 6 | |
| M8×1 | 5/16-24UNF | 90 | 19 | 44 | 46 | 6 | 4.9 | 8 |
| M8×0.75 M8×0.5 | 80 | 19 | 39 | 41 | 6 | 4.9 | 8 | |
| M10×1.25 | 3/8-24UNF | 100 | 23 | 49 | 51 | 7 | 5.5 | 8 |
| M10×1 M10×0.75 | 90 | 19 | 44 | 46 | 7 | 5.5 | 8 | |
| M12×1.5 M12×1.25 M12×1 | 100 | 21 | 49 | 51 | 9 | 7 | 10 | |
| M14×1.5 M14×1.25 M14×1 | 100 | 21 | 49 | 51 | 11 | 9 | 12 | |
| M16×1.5 M16×1 | 5/8-18UNF | 100 | 21 | 49 | 51 | 12 | 9 | 12 |
| M18×2 | 125 | 33 | 61 | 64 | 14 | 11 | 14 | |
| M18×1.5 M18×1 | 110 | 24 | 54 | 56 | 14 | 11 | 14 | |
| M20×2 | 140 | 33 | 69 | 71 | 16 | 12 | 15 | |
| M20×1.5 M20×1 | 125 | 24 | 61 | 64 | 16 | 12 | 15 | |
| M22×2 | 140 | 33 | 69 | 71 | 18 | 14.5 | 17 | |
| M22×1.5 M22×1 | 7/8-14UNF | 125 | 24 | 61 | 64 | 18 | 14.5 | 17 |
| M24×2 M24×1.5 M24×1 | 140 | 27 | 69 | 71 | 18 | 14.5 | 17 | |
| M26×1.5 | 140 | 27 | 69 | 71 | 18 | 14.5 | 17 | |
| M27×2 M27×1.5 M27×1 | 140 | 27 | 69 | 71 | 20 | 16 | 19 | |
| M30×2 M30×1.5 M30×1 | 1'1/8-12UNF | 150 | 27 | 73 | 77 | 22 | 18 | 21 |