F1 grenade (Australia)

F1 grenade
Australian soldier lobbing a grenade during RIMPAC Exercise 2014.
Type	Time-fused grenade
Place of origin	Australia
Service history
In service	2006–present
Used by	Australia
Wars	War in Afghanistan (2001–present)
Production history
Designer	Thales Australia
Specifications
Weight	375 g
Length	96mm
Diameter	58mm
Filling	RDX (phlegmatized with paraffin wax)
Filling weight	62 g
Detonation mechanism	Timed Fuse

The F1 fragmentation hand grenade is manufactured by Thales Australia and is used by the Australian Defence Force replacing the M26 grenade. The F1 is a high explosive, anti-personnel grenade with a lethal radius of 6 metres (6.6 yd), casualty radius of 15 metres (16 yd) and a safety radius of 30 metres (33 yd).^[1] The grenade weighs 375g and contains over 4000 2.4 mm steel ball fragments arranged to achieve uniform distribution of lethal fragments through 360° upon functioning. It has a fuse time of 4.5 to 5.5 seconds.^[1] Thales Australia also manufactures an F3 practice grenade, being a non-fragmentation replica of the F1 used for training, incorporates a high impact aluminium die cast body and hazard band with a distinctive appearance. The F3 practice hand grenade has a replaceable pyrotechnic fuze that displays an audible output and a distinct cloud of white smoke visible to 200 metres (220 yd) to indicate functioning.^[1]

A number of failures of the F1 grenades to detonate were reported in 2006 during combat operations in the Middle East. Later, in September 2007, the grenade was temporarily withdrawn from service after a civilian Defence employee was seriously injured in an accident at the Defence Proof and Experimental Establishment at Graytown, Victoria. Stocks of the M67 grenade were procured from the United States in the interim.^[2] The grenade was returned to service in October 2007 after it was deemed technically sound.^[3]

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