| TAPPING SCREW ASA TYPE AB(B) | |||||
| 美國規格鐵板螺絲AB型(B)型 | |||||
| 規格 | 牙數 | 外徑（D） | 輾造徑（d） | ||
| MAX | MIN | MAX | MIN | ||
| NO.0 | 48 | 1.52 | 1.44 | 1.25 | 1.20 |
| NO.1 | 42 | 1.90 | 1.82 | 1.60 | 1.55 |
| NO.2 | 32 | 2.23 | 2.13 | 1.80 | 1.75 |
| NO.3 | 28 | 2.56 | 2.46 | 2.05 | 2.00 |
| NO.4 | 24 | 2.89 | 2.79 | 2.30 | 2.25 |
| NO.5 | 20 | 3.30 | 3.20 | 2.60 | 2.55 |
| NO.6 | 20 | 3.53 | 3.43 | 2.85 | 2.80 |
| NO.7 | 19 | 3.91 | 3.78 | 3.15 | 3.10 |
| NO.8 | 18 | 4.21 | 4.09 | 3.40 | 3.35 |
| NO.10 | 16 | 4.80 | 4.65 | 3.90 | 3.85 |
| NO.12 | 14 | 5.46 | 5.31 | 4.40 | 4.35 |
| 1/4 | 14 | 6.25 | 6.10 | 5.20 | 5.15 |
| 5/16 | 12 | 8.00 | 7.82 | 6.75 | 6.70 |
| 3/8 | 12 | 9.65 | 9.42 | 8.45 | 8.35 |
| 7/16 | 10 | 11.17 | 10.94 | 9.75 | 9.70 |
| 1/2 | 10 | 12.8 | 12.57 | 11.4 | 11.35 |
