Slotted 90°Countersunk Head Screws with B.S.W. & B.S.F. Threads [Table 2]
BS 450 - 1958 英制开槽沉头螺钉 - B.S.W. & B.S.F. 螺纹 [Table 2]
See all versions and complete specifications: Slotted 90°Countersunk Head Screws with B.S.W. & B.S.F. Threads [Table 2] — Full Specification Page
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| 1/4 | 0.5000 | 0.111 | 0.875 | 0.835 | 12 | 16 | 0.104 | 0.092 | 0.950 | 0.225 |
| 1/8 | 0.1875 | 0.041 | 0.328 | 0.307 | 24 | 32 | 0.05 | 0.042 | 0.356 | 0.084 |
| 3/8 | 0.7500 | 0.166 |
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| 1.312 |
| 1.257 |
| 10 |
| 12 |
| 0.148 |
| 0.134 |
| 1.425 |
| 0.338 |
| 3/16 | 0.2500 | 0.055 | 0.438 | 0.412 | 20 | 26 | 0.061 | 0.051 | 0.475 | 0.113 |
| 5/16 | 0.6250 | 0.138 | 1.094 | 1.046 | 11 | 14 | 0.126 | 0.113 | 1.187 | 0.281 |
| 7/32 | 0.3750 | 0.083 | 0.656 | 0.624 | 16 | 20 | 0.082 | 0.072 | 0.712 | 0.169 |
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