BS 4320 METRIC SERIES (FORM A & B) BS 4320 METRIC SERIES (FORM A & B)
TECHNICAL DATA
NOMINAL SIZE OF BOLT OR SCREW |
INSIDE DIAMETER (D1)MM |
OUTER DIAMETER (D2)MM |
THICKNESS MM | |
| FORM A (NORMAL RANGE) |
PIPEFORM B (NORMAL RANGE) |
|||
| Min - Max | Min - Max | Min - Max | Min - Max | |
| M3 | 3.2 - 3.4 | 6.7 - 7.0 | 0.4 - 0.6 | - |
| M4 | 4.3 - 4.5 | 8.7 - 9.0 | 0.7 - 0.9 | - |
| M5 | 5.3 - 5.5 | 9.7 - 10.0 | 0.9 - 1.1 | - |
| M6 | 6.4 - 6.7 | 12.1 - 12.5 | 1.4 - 1.8 | 0.7 - 0.9 |
| M8 | 8.4 - 8.7 | 16.6 - 17.0 | 1.4 - 1.8 | 0.9 - 1.1 |
| M10 | 10.5 - 10.9 | 20.5 - 21.5 | 1.8 - 2.2 | 1.05 - 1.45 |
| M12 | 13.0 - 13.4 | 23.5 - 24.0 | 2.3 - 2.7 | 1.4 - 1.8 |
| M14 | 15.0 - 15.4 | 27.5 - 28.0 | 2.3 - 2.7 | 1.4 - 1.8 |
| M16 | 17.0 - 17.4 | 29.5 - 30.0 | 2.7 - 3.3 | 1.8 - 2.2 |
| M18 | 19.0 - 19.5 | 33.2 - 34.0 | 2.7 - 3.3 | 1.8 - 2.2 |
| M20 | 21.0 - 21.5 | 36.0 - 37.0 | 2.7 - 3.3 | 1.8 - 2.2 |
| M22 | 23.0 - 23.5 | 38.2 - 39.0 | 2.7 - 3.3 | 1.8 - 2.2 |
| M24 | 25.0 - 25.5 | 43.2 - 44.0 | 3.7 - 4.3 | 2.3 - 2.7 |
| M27 | 28.0 - 28.5 | 49.2 - 50.0 | 3.7 - 4.3 | 2.3 - 2.7 |
| M30 | 31.0 - 31.6 | 55.0 - 56.0 | 3.7 - 4.3 | 2.3 - 2.7 |
| M33 | 34.0 - 34.6 | 59.0 - 60.0 | 4.4 - 5.6 | 2.7 - 3.3 |
| M36 | 37.0 - 37.6 | 65.0 - 66.0 | 4.4 - 5.6 | 2.7 - 3.3 |
| M39 | 40.0 - 40.6 | 71.0 - 72.0 | 5.4 - 6.6 | 2.7 - 3.3 |
FINISH AVAILABLE : ZP, HSG
