Cross Recessed Raised Countersunk Head Tapping Screws - Threaded Portion are of Class 1 to 4 [Annex Attached Table 3]
JIS B 1122 (AAT3) - 1996 十字槽半沉头自攻钉 - 螺纹型式：Class 1~Class 4 [附表3]
See all versions and complete specifications: Cross Recessed Raised Countersunk Head Tapping Screws - Threaded Portion are of Class 1 to 4 — Full Specification Page
| Size | P | e | r | k_max | k_min | s_max | s_min | ds_max | ds_min | k_nominal | ds_nominal |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2 | 5 | 1.34 | 1.72 | 0.2 | 0.55 | 4.6 | 1.45 | 1 | 2.9 | 1.25 | 0.6 |
| 3 | 9 | 2.38 | 2.93 | 0.3 | 1 | 8.4 | 2.55 | 2 |
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| 5.1 |
| 2.25 |
| 1 |
| 2.5 | 7 | 1.60 | 2.13 | 0.25 | 0.8 | 6.5 | 2 | 2 | 4.3 | 1.7 | 0.8 |
| 3.5 | 12 | 2.90 | 3.46 | 0.4 | 1.4 | 11.3 | 3.4 | 3 | 6.9 | 3.0 | 1.4 |
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