BS 4320 METRIC SERIES (FORM F) BS 4320 METRIC SERIES (FORM F)
TECHNICAL DATA
| NOMINAL SIZE OF BOLT OR SCREW |
INSIDE DIAMETER (D1) MM |
OUTER DIAMETER (D2) MM |
THICKNESS (T) MM |
| Min - Max | Min - Max | Min - Max | |
| M8 | 9.0 - 9.4 | 20.2 - 21.0 | 1.3 - 1.9 |
| M10 | 11.0 - 11.5 | 23.2 - 24.0 | 1.7 - 2.3 |
| M12 | 14.0 - 14.5 | 27.2 - 28.0 | 2.2 - 2.8 |
| M14 | 16.0 - 16.5 | 29.2 - 30.0 | 2.2 - 2.8 |
| M16 | 18.0 - 18.5 | 32.8 - 34.0 | 2.4 - 3.6 |
| M18 | 20.0 - 20.6 | 35.8 - 37.0 | 2.4 - 3.6 |
| M20 | 22.0 - 22.6 | 37.8 - 39.0 | 2.4 - 3.6 |
| M22 | 24.0 - 24.6 | 42.8 - 44.0 | 2.4 - 3.6 |
| M24 | 26.0 - 26.6 | 48.8 - 50.0 | 3.4 - 4.6 |
| M27 | 30.0 - 30.6 | 54.5 - 56.0 | 3.4 - 4.6 |
| M30 | 33.0 - 33.8 | 58.5 - 60.0 | 3.4 - 4.6 |
| M33 | 36.0 - 36.8 | 64.5 - 66.0 | 4.0 - 6.0 |
| M36 | 39.0 - 39.8 | 70.5 - 72.0 | 4.0 - 6.0 |
| M39 | 42.0 - 42.8 | 75.5 - 77.0 | 5.0 - 7.0 |
