ISO 7051 Cross Recessed Countersunk Head Tapping Screws
ISO 7051 Equivalents
Countersunk (Flat) Head Tapping Screws With Cross Recess, Form C
ISO 7051 Dimensions
| Thread size | P | a | dk | f | k | r | rf | Cross recess | Type H | Type Z | y | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| m | Penetration deptd | m | Penetration deptd | max. | |||||||||||||
| max. | nominal=max. | min. | approx. | approx. | max. | approx. | No. | approx. | min. | max. | approx. | min. | max. | Type C | Type F | ||
| ST2.2 | 0.8 | 0.8 | 4.3 | 4 | 0.7 | 1.3 | 0.8 | 3.8 | 1 | 2.8 | 1.17 | 1.57 | 2.4 | 1.1 | 1.35 | 2 | 1.6 |
| ST2.9 | 1.1 | 1.1 | 5.5 | 5.2 | 0.9 | 1.7 | 1.1 | 4.6 | 1 | 3.4 | 1.81 | 2.21 | 3.1 | 1.83 | 2.08 | 2.6 | 2.1 |
| ST3.5 | 1.3 | 1.3 | 6.8 | 6.44 | 1.2 | 2.1 | 1.4 | 5.4 | 2 | 4.6 | 1.89 | 2.39 | 4.3 | 1.88 | 2.34 | 3.2 | 2.5 |
| (ST3.9) | 1.3 | 1.3 | 7.5 | 7.14 | 1.3 | 2.3 | 1.5 | 6 | 2 | 4.7 | 2.04 | 2.54 | 4.4 | 2 | 2.46 | 3.5 | 2.7 |
| ST4.2 | 1.4 | 1.4 | 8.1 | 7.74 | 1.4 | 2.5 | 1.6 | 6.6 | 2 | 4.9 | 2.24 | 2.74 | 4.6 | 2.26 | 2.72 | 3.7 | 2.8 |
| ST4.8 | 1.6 | 1.6 | 9.5 | 9.14 | 1.5 | 3 | 1.9 | 8.2 | 2 | 5.4 | 2.7 | 3.2 | 5.1 | 2.69 | 3.15 | 4.3 | 3.2 |
| ST5.5 | 1.8 | 1.8 | 10.8 | 10.37 | 1.7 | 3.4 | 2.1 | 9.4 | 3 | 7 | 3.02 | 3.53 | 6.6 | 2.92 | 3.38 | 5 | 3.6 |
| ST6.3 | 1.8 | 1.8 | 12.4 | 11.97 | 2 | 3.8 | 2.4 | 11.1 | 3 | 7.4 | 3.46 | 3.96 | 7.1 | 3.4 | 3.86 | 6 | 3.6 |