Standard BS 4174 21
Hexagon head self tapping screws
| Dimensions in mm - source BS 4174 Table 21 Hexagon head self tapping screws Publication date: 10 - 1972 | ||||||||
| Ø thread size | s min | s max | k min | k max | e min | e max | ||
| ST 2.9 | 4.82 | 5 | 1.38 | 1.62 | 5.40 | 5.8 | ||
| ST 3.5 | 5.32 | 5.5 | 2.18 | 5.95 | 5.95 | 6.4 | ||
| ST 4.2 | ||||||||
| ST 4.8 | ||||||||
| ST 5.5 | ||||||||
| ST 6.3 | ||||||||
| ST 8 | ||||||||