Point Detonating Fuze M572 is intended for use only with 175mm, HE projectiles at all charges, and Is designed to withstand structurally the acceleration forces involved.
The fuze is similar to, but structurally superior to Fuze M557. Fuze M572 consists essentially of Fuze M48A3 modified with an epoxy filler in the ogive cavity for reinforcement, and assembled with Booster M125A1 as an integral component. A superquick element in the head consists of a firing pin, firing pin support and Detonator M24. The body of the fuze is epoxy filled within the thin walled ogive. The fuze body contains a delay plunger assembly, and a selective setting device for superquick or delay action. The delay plunger assembly includes a firing pin and Delay Element M2, consisting of primer M54, black powder delay charge, and Relay M7. The M125A1 booster consists of a brass booster body having external threads to fit projectiles having 2-inch diameter, 12 threads per inch cavities, and Internal threads to receive fuzes having 1.7 inch diameter, 14 threads per inch. An aluminum booster cup containing a 340 grain tetryl booster pellet is threaded to the booster body. The M125A1 booster internal configuration is that of an eccentric rotor containing an M17 detonator held in an unarmed (out of line) position by centrifugal detents and a gear train mechanism which provides for delayed arming of the booster aseembly until the projectile is approximately 200 feet from the muzzle, depending upon the weapon and charge being fired.
No information about hazardous components.