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M768 time fuze
#WIP FUZES
Region
United States
Category
Ammunition, Missiles and precision weapons
Armament M301A3 and M853 81 mm illuminating bombs and M819 smoke bomb. Development By US Army Ordnance as a replacement for the M84A1 time fuze. Description The M768 is a waterproof powder train delay fuze that utilises tungsten, as a delay composition can be set for up to 62 seconds and has only one time ring. Safety is provided by a safety pull wire and a shear pin in the firing pin, plus non-alignment of the firing train until the fuze is set. Upon firing, setback moves the firing pin to the rear severing the
shear pin and firing the M39A1 primer. The primer ignites the A1A ignition powder, which ignites the tungsten delay composition in the time ring. After the set delay burns through, it ignites a boron-potassium-nitrate pellet that in turn ignites a black powder expelling charge. The M768 is identical to the M84A1E1 and similar to the M769, except that the M768 is larger. Manufacturer US government contractors.