Square Head Bolts [Table 1]
ASME B 18.2.1 (T1) - 2010 方头螺栓 [Table 1]
See all versions and complete specifications: Square Head Bolts [Table 1] — Full Specification Page
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2 | 7 | 0.720 | 0.780 | 1.688 | 1.631 | 1.149 | 1.098 | 2.239 | 3/4 | 1-11/16 | 2.386 |
| 1/4 | 18 | 0.186 | 0.220 | 0.500 | 0.484 | 0.324 | 0.298 | 0.665 | 13/64 | 1/2 | 0.707 |
| 3/4 | 6 | 0.964 | 1.036 | 2.250 | 2.175 | 1.531 | 1.47 | 2.986 | 1 | 2-1/4 | 3.182 |
| 3/8 | 11 | 0.400 | 0.444 | 0.938 |
Request detailed technical specifications, material certifications, and availability information for your application requirements. Our engineering team can provide product recommendations, custom specifications, and technical documentation.
| 0.906 |
| 0.642 |
| 0.605 |
| 1.244 |
| 27/64 |
| 15/16 |
| 1.326 |
| 5/8 | 6 | 0.872 | 0.940 | 2.062 | 1.944 | 1.404 | 1.345 | 2.738 | 29/32 | 2-1/16 | 2.917 |
| 5/16 | 14 | 0.278 | 0.316 | 0.625 | 0.603 | 0.452 | 0.421 | 0.828 | 19/64 | 5/8 | 0.884 |
| 7/16 | 9 | 0.568 | 0.620 | 1.312 | 1.269 | 0.895 | 0.852 | 1.742 | 19/32 | 1-5/16 | 1.856 |
© 2026 Ningbo Ruixi Metal Surface Technology Co., Ltd.. All rights reserved.