
Fuze M67A3 is a mechanical time fuze used with high explosive projectiles in calibers from 105mm to 280mm (field weapons only) and with 90mm high explosive cartridge M71. Because of its longer time range, the fuze also has replaced M55 series TSQ fuzes for use for high burst ranging with these calibers.
No information about functioning.
MIL-HDBK-146, Fuze Catalog (1982)
TM 9-1300-203, Artillery Ammunition (1967)
TM 9-1385-51, Ammunition (Conventional) for Explosive Ordnance Disposal (1967)
TM 9-1904, Ammunition Inspection Guide (1944)