Metric adaptors are similar to British Standard Pipe (BSP) adaptors only with a metric thread and usually identifiable by a ‘nick’ in the hex. Metric adaptors have parallel threads and 60 degree cones.
METRIC Pressure Ratings and Torque Values
| Thread | Dashsize | Working pressure | Tightening Torque | ||
|---|---|---|---|---|---|
| Mpa | bar | psi | Nm | ||
| M10 | -10 | 35 | 350 | 5075 | 10 |
| M12 | -12 | 35 | 350 | 5075 | 20 |
| M14 | -14 | 35 | 350 | 5075 | 20 |
| M16 | -16 | 35 | 350 | 5075 | 35 |
| M18 | -18 | 31.5 | 315 | 4568 | 60 |
| M26 | -26 | 25 | 250 | 3625 | 115 |
| M30 | -30 | 20 | 200 | 2900 | 140 |
| M36 | -36 | 20 | 200 | 2900 | 140 |
| M42 | -42 | 16 | 160 | 2175 | 210 |
| M52 | -52 | 10 | 100 | 1450 | 265 |
DESIGN DETAILS AND SPECIFICATIONS SUBJECT TO CHANGE WITHOUT PRIOR NOTICE – Whilst every effort has been made to ensure the accuracy of the information supplied herein, Burnett & Hillman cannot be held responsible for any errors or omissions (E&OE). Working pressures quoted are taken from the relevant standard and are provided as a guide only.
Looking for specific dimensions, alternative thread styles, or configurations? Click below to search our full inventory of UK-manufactured Metric components across all sizes, including DIN 2353 compression fittings, standpipes, plugs, and cutting rings.