US Cartridge, 37mm HE-T, SD, M54A1
These are general purpose projectiles used for blast and fragmentation effect against personnel, unarmored material targets, and aircraft. They contain a substantial HE main charge and consequently have relatively thin to medium body-wall thickness. Their fragmentation effect results from fracture of the body wall on detonation of the main charge. They are or may be fitted with a variety of fuzes for effective use in engaging different types of targets. The complete round of M54, HE Shell can be identified for the Antiaircraft Gun M1A2 by the extracting groove in the cartridge case. The presence of the M56 Fuze identifies the round as HE M54. The only other 37-mm round for the M1A2 Gun that has a fuze is the practice round. The complete round is 12.81 inches long and weighs 2.62 pounds.
Collaborative Ordnance Data Repository