Mk 3 mine

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Type Anti-tank mine
Place of origin United Kingdom
Service history
Wars World War 2
Weight 2.6 kilograms (5 lb 10 oz)
Height 133 millimetres (5.25 in)
Diameter 150 millimetres (6 in)

Filling TNT
Pressure plate

The Mk 3 mine or Mine G.S. Mk III was a British anti-tank mine used during World War II. The mine had a cylindrical tin lower body with a steel pressure plate which sits on top of a shear-wire restrained spring-loaded striker. Sufficient pressure (160 kilograms (350 lb)) on the cover shears the restraining wire, allowing the striker spring to push the striker into a 0.11 grams (1.7 gr) percussion cap. The flash from the percussion cap is transferred to the No.27 detonator which sits in the center of the mine, detonating the device.


  • NAVORD OP 1665, British Explosive Ordnance, Naval Ordnance Systems Command (Updated 1970)