Standard BS 4174 9
80° Recess countersunk head screws, type Z
| Dimensions in mm - source BS 4174 Table 9 80° Recess countersunk head screws, type Z: Publication date: 10 - 1972 | ||||||||
| Ø thread size | dk min | dk max | k nom | t min | t max | m nom | recess nr. | |
| ST 2.2 | 3.73 | 4.37 | 1.3 | 1.19 | 1.6 | 2.4 | 1 | |
| ST 2.9 | 4.95 | 5.71 | 1.7 | 1.85 | 2.26 | 3.05 | 1 | |
| ST 3.5 | ||||||||
| ST 4.2 | ||||||||
| ST 4.8 | ||||||||
| ST 5.5 | ||||||||
| ST 6.3 | ||||||||
| ST 8 | ||||||||