| diamter mm |
D -0.02/-0.04 |
| 12 | 12 |
| 14 | 14 |
| 18 | 18 |
| 23 | 23 |
| 25 | 25 |
| 30 | 30 |
| diamter inch |
D +0.01/-0.01 |
A +0.1/-0.1 |
B +0.1/-0.1 |
| 7/16 | 11.11 | 3.2 | 1.6 |
| 9/16 | 14.29 | 5.4 | 2.7 |
| 7/8 | 22.23 | 5.4 | 2.7 |
| 1 | 25.40 | 5.4 | 2.7 |
| 11/4 | 31.75 | 5.4 | 2.7 |
| 11/2 | 38.10 | 5.4 | 2.7 |
| * | "M" (length of cross recess) and "Q" (depth of cross recess) |
| "M" dimension is shown only for reference because the related variable for the JIS standard has been revised in 1985. | |
| "Q" dimension is about 2/3 of the standard dimension for each screw. We are making efforts to make deviations within 0.1. | |
| * | Other dimensions |
| Except punches for flat head screws, head part dimension is given some allowance to meet standard dimensions for screws. | |
