Type I Cross Recessed Oval Countersunk Head Tapping Screws - Type C Thread Forming [Table 21]
ASME B 18.6.4 - 1998 (R2005) I型十字槽半沉头自攻螺钉 C型(统一螺纹) [Table 21]
See all versions and complete specifications: Type I Cross Recessed Oval Countersunk Head Tapping Screws - Type C Thread Forming [Table 21] — Full Specification Page
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2# | 0.0990 | 1 | 0.019 | 0.059 | 0.033 | 7/32 | 0.187 | 0.118 | 0.072 | 0.167 | 0.092 |
| 3# | 0.1250 | 2 | 0.028 | 0.075 | 0.041 | 1/4 | 0.237 | 0.152 | 0.073 | 0.215 | 0.116 |
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| 4# | 0.1640 | 2 | 0.031 | 0.100 | 0.052 | 7/16 | 0.312 | 0.186 | 0.107 | 0.285 | 0.152 |
| 5# | 0.2160 | 3 | 0.038 | 0.132 | 0.068 | 9/16 | 0.412 | 0.264 | 0.140 | 0.380 | 0.200 |
| 6# | 0.3125 | 4 | 0.065 | 0.191 | 0.099 | 5/8 | 0.597 | 0.384 | 0.226 | 0.556 | 0.290 |
| 8# | 0.3750 | 4 | 0.068 | 0.230 | 0.117 | 5/8 | 0.717 | 0.404 | 0.245 | 0.670 | 0.347 |
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