UNC 粗牙螺纹
ASME B1.1
| 挤压螺纹尺寸 |
挤压螺纹预钻孔直径
|
| Ø P Gg/1" | ømm |
| 2–56 UNC | 1,97 |
| 3–48 UNC | 2,26 |
| 4–40 UNC | 2,55 |
| 5–40 UNC | 2,87 |
| 6–32 UNC | 3,15 |
| 8–32 UNC | 3,80 |
| 10–24 UNC | 4,30 |
| 12–24 UNC | 5,00 |
| 1/4–20 UNC | 5,75 |
| 5/16–18 UNC | 7,25 |
| 3/8–16 UNC | 8,75 |
| 7/16–14 UNC | 10,30 |
| 1/2–13 UNC | 11,80 |
| 9/16–12 UNC | 13,30 |
| 5/8–11 UNC | 14,80 |
| 3/4–10 UNC | 17,90 |