美制六角头螺栓（粗制）B18.2.1
- 质量稳定：实行全过程质量监控，细致入微，全方位检测！
- 价格合理：高效内部成本控制，减少了开支，让利于客户！
- 交货快捷：先进生产流水线，充足的备货，缩短了交货期！
产品参数:
ANSI/ASME
B18.2.1 IFI C-6 (A-6)
| Thread Size | 1/4 | 5/16 | 3/8 | 7/16 | 1/2 | 5/8 | 3/4 | 7/8 | 1 | 1-1/8 | 1-1/4 |
| Thread Pitch inch | 20 | 18 | 16 | 14 | 13 | 11 | 10 | 9 | 8 | 7 | 7 |
| K | 11/64 | 7/32 | 1/4 | 19/64 | 11/32 | 27/64 | 1/2 | 37/64 | 43/64 | 3/4 | 27/32 |
| S | 7/16 | 1/2 | 9/16 | 5/8 | 3/4 | 15/16 | 1-1/8 | 1-5/16 | 1-1/2 | 1-11/16 | 1-7/8 |
| L | 1/2~4 | 5/8~4 | 3/4~4 | 7/8~4 | 1~4 | 1-1/4~6 | 1-1/2~6 | 1-3/4~10 | 2~10 | 2-1/4~11-1/4 | 2-1/2~12-1/2 |
