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Ordnance, Explosives, and Related Items




The AN-M103 was the standard nose fuze in service. When shipped, the fuze is set for delay action. One auxiliary booster is required when this fuze is used in Navy bombs. When used in light-case, fragmentation, chemical, incendiary, and aircraft depth bombs, the fuze should be set for instantaneous action to prevent breaking up of the bomb case before detonation occurs.

The Nose Mechanical Impact Fuze M103 had 32 single threads per inch on the arming screw, instead of 28 double threads per inch on the AN-M103, resulting in an arming time of 850 vane revolutions for instantaneous firing and 525 vane revolutions when set for delay action. The M103 had larger and weaker vane construction.

Especially large vanes have been designed for the AN-M103 for use with flatnosed depth bombs, as the regular vanes have difficulty in arming.

The AN-M103 can be used for dive bombing, but not for masthead bombing.

Hazardous Components

No information about hazardous components.

See Also

Nose, Impact, M148


TM 9-1385-51, Ammunition (Conventional) for Explosive Ordnance Disposal (1967)

TM 3-400, Chemical Bombs and Clusters (1957)

OP 1664, Volume 2 - US Explosive Ordnance (1947)

USNBD - Bombs and Fuzes, Pyrotechnics (1945)

TM 9-1904, Ammunition Inspection Guide (1944)