Jam tin grenade

Double-cylinder grenade
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 body or other heavy object to keep it unarmed until it was disturbed.

References

Wintirngham, Tom (2 March 1940). "Shells and Grenades". Picture Post.

External links

British Grenades of World War I & World War II

Anti-personnel	Grenade, No 1 No 2 grenade "Hales Pattern" Nos. 3, 20, 24, 35 "Hales Rifle Grenade" Nos. 5, 23, 36 Mills No. 6 grenade No. 15 Ball grenade No. 69 Nos. 8, 9 Double Cylinder Jam Tin

Anti-tank	No. 68 AT (Rifle) No. 73 Thermos No. 74 Sticky bomb No. 75 AT Hawkins

Special Types	No. 82 Gammon No. 76 (WP) No. 77 (WP) Lewes bomb Bomb, ground, 6 lb

British Empire Small Arms & Ordnance of the First World War

No. 1
No. 2 Hales Pattern
Nos. 3, 20, 24, 35 Hales rifle grenades
Nos. 5, 23, 36 Mills
No. 6
Nos. 8, 9 Jam Tin
No. 13 Battye
No. 14 Pitcher
No. 15 Ball
No. 16 Oval
No. 17 Opera hat
No. 18
No. 19
No. 21 "Spherical"
No. 22 Newton-Pippin
No. 25 Sangster
No. 27
No. 28 Chemical
No. 29 Gas
No. 31 Day Signal
No. 32 Night Signal
No. 32 "Spherical E"
No. 34 Egg
No. 37
No. 39 Steuart Pattern

Artillery

Tank guns	QF 6 pounder Hotchkiss QF 6 pounder 6 cwt

Infantry guns	1.59-inch Breech-Loading Vickers Q.F. Gun, Mk II ("Vickers-Crayford rocket gun")

Field Artillery	BL 12 pounder 6 cwt QF 12 pounder 8 cwt QF 12 pounder 18 cwt QF 13 pounder BL 15 pounder BLC 15 pounder QF 15 pounder QF 18 pounder QF 4 inch gun Mk III BL 4 inch gun Mk VII QF 4.5 inch Howitzer

Mountain artillery	RML 2.5 inch Mountain Gun BL 10 pounder Mountain Gun BL 2.75-inch Mountain Gun QF 2.95 inch Mountain Gun QF 3.7-inch mountain howitzer

Howitzers, medium, and heavy artillery	QF 4.7 inch Gun BL 5 inch Howitzer BL 5.4 inch Howitzer BL 60 pounder gun BLC 6 inch siege gun BL 6 inch Gun Mk VII BL 6 inch Gun Mk XIX BL 6-inch 26 cwt howitzer BL 6-inch 30 cwt howitzer BL 8 inch Howitzer Mk I - V BL 8 inch Howitzer Mk VI - VIII

Siege artillery	BL 7.5 inch Mk III naval gun BL 9.2-inch howitzer BL 9.2 inch Mk X naval gun BL 12 inch Howitzer BL 12 inch Mk X naval gun BL 15 inch Howitzer

Coastal artillery	QF 4 inch naval gun Mk I – III BL 6 inch Mk VII naval gun BL 9.2 inch gun Mk IX–X RML 9 inch

Mortars

Grenade launchers

Smoke and chemical weapons

Railway guns

Anti-aircraft guns

Foreign weapon designs
in British Empire Armies use

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