Description
Point Detonating Fuzes M508A1 and M508 are single action, delayed arming impact fuzes used to detonate 105mm, 155mm, and 8 inch gas or smoke WP projectiles.
The M508 series fuzes consist of a PD head assembly containing a firing pin held in position by a firing pin support which prevents initiation of Detonator M18 until impact; a stamped steel windshield to provide an aerodynamic shape to the fuze; a fuze body containing an interrupter assembly to provide boresafe firing; and an M125A1 or M125 booster assembly. The boosters are physically similar. Booster M125A1 requires 200 feet of projectile travel before arming, and Booster M125 requires 150 feet. The threaded brass body of the booster contains a delayed arming mechanism, Detonator M17, and a tetryl lead charge. The delayed arming mechanism is operated by centrifugal force acting through a gear train to turn a rotor carrying Detonator M17. In the unarmed position, the detonator is held out of line with the flash hole in the booster cover by rotor detents. An aluminum cup containing a 340-grain tetryl charge is threaded onto the base of the booster.
Functioning
No information about functioning.
Hazardous Components
No information about hazardous components.
See Also
Nothing else to see.
Source(s)
TM 43-0001-28, Artillery Ammunition (chg 11, 2003)
TM 9-1300-203, Artillery Ammunition (1967)
TM 9-1385-51, Ammunition (Conventional) for Explosive Ordnance Disposal (1967)
