Description
Point Detonating Fuze M720 is of the superquick type used with 152mm gun Cartridge M657 and functions on impact or graze.
The fuze is essentially Fuze M557 modified to provide arming at closer than normal range and to assure superquick or non-delay detonation upon impact or graze. A superquick element in the head consists of a firing pin, firing pin support, and Detonator M24. The body of the fuze is a thin wall ogive containing non delay inertial type Plunger Assembly M1. No optional delay setting is provided; the fuze as issued is preset on superquick. Booster M125A1 has been modified for use with Fuze M720 to reduce the normal arming distance to not less than 25 feet. The booster has a brass body internally threaded to accept the fuze body and externally threaded to fit Cartridge M657. A 340 grain tetryl booster charge is contained by an aluminum cup threaded onto the base of the booster. The booster body contains Detonator M17 and a spin activated mechanism to provide the delayed arming safety.
Functioning
No information about functioning.
Hazardous Components
No information about hazardous components.
See Also
Cartridge, 152mm HE-T, M657, XM657E2
Source(s)
TM 43-0001-28, Artillery Ammunition (chg 11, 2003)
