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Jam tin grenade

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Jam tin grenade

Double-cylinder grenade
Trench improvised explosive device in a milk tin and a similar manufactured double cylinder grenade (A Great War Society munition)
Reproduction of a trench improvised explosive device in a milk tin, and a similar manufactured double cylinder grenade
Type Hand grenade
Place of origin Australia
Service history
In service 1915 -
Specifications
Filling Ammonal + steel fragments
Detonation
mechanism
Timed friction fuse

The double cylinder, No 8 and No 9 hand grenades, also known as the "jam tin", is a type of improvised explosive device used by the Australian Army in World War I. The jam tin, or bully beef tin, was one of many grenades designed by ANZACS in the early part of the First World War in response to lack of equipment suited to trench warfare.

The grenade was an inner can of explosive with an outer can of metal fragments or ball bearings. The heavier pattern No 9 grenade contained more high explosive and more metal fragments.

The fuse was ignited by a friction device or a cigarette.

Initially when demand for grenades was at its greatest, engineers were encouraged to improvise their own grenades from the tins containing the soldier's ration of jam, hence the name. Incidents with the improvised form and the supply of superior grenades led to official withdrawal of the design.

Jam tin grenades were used as booby traps by ANZACS, by rigging it to a pressure trigger and leaving it under a

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