
| Type | HE |
|---|---|
| Projectile | steel, brass fuze, 1 copper driving band Projectile Markings: (stamped on fuze) (tip) M 42 (side) MK XXVI MOD B AC LOT 439 (stamped on projectile) A.S.R. 20MM. MK. III MOD. 1 1/42 |
| Case | brass, segmented crimp |
| Primer | none |
| Headstamp | NOEN 66 1942 20M.M-MK.2 |
| Notes | Projectile and fuze are inert. |