Slotted Undercut Flat Countersunk Head Tapping Screws - Type C Thread Forming [Table 13]
ASME B 18.6.4 - 1998 (R2005) 开槽沉头清根自攻锁紧螺钉 C型(统一螺纹) [Table 13]
See all versions and complete specifications: Slotted Undercut Flat Countersunk Head Tapping Screws - Type C Thread Forming [Table 13] — Full Specification Page
| Size | P | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|
| 2# | 0.0990 | 0.012 | 0.042 | 0.033 | 7/32 | 0.187 | 0.027 | 0.019 | 0.167 | 0.035 |
| 3# | 0.1250 | 0.016 | 0.053 | 0.043 | 1/4 | 0.237 | 0.035 | 0.024 | 0.215 | 0.043 |
| 4# | 0.1640 |
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| 0.021 |
| 0.070 |
| 0.058 |
| 7/16 |
| 0.312 |
| 0.045 |
| 0.032 |
| 0.285 |
| 0.054 |
| 5# | 0.2160 | 0.028 | 0.092 | 0.078 | 9/16 | 0.412 | 0.056 | 0.043 | 0.380 | 0.067 |
| 6# | 0.3125 | 0.041 | 0.134 | 0.116 | 5/8 | 0.597 | 0.072 | 0.062 | 0.556 | 0.084 |
| 8# | 0.3750 | 0.049 | 0.161 | 0.140 | 5/8 | 0.717 | 0.081 | 0.075 | 0.670 | 0.094 |
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