Use: In conjunction with the type 89 (powder time) type 2 powder time and impact fuze and type 100 mechnical time and impact fuze.

Over-all length: 1 13/16 inches.

Length (without gaine): 1 1/4 inches.

Maximum diameter: 1 1/2 inches.

Threaded length: 5/16 inch.

Number of threads: 7, right-hand.

Construction: This fuze is made of two brass sections. The top portion is threaded (R.H.) externally to fit into the fuze pocket and internally to receive the base portion. Centrally located in the top plate is a flash hole leading to a relay charge and the gaine. The mechanism housed within the fuze consists of an arming collar supported by a coiled spring and the ears of a circumferential latch spring. In the unarmed position, a metal shutter, held in place by the lower portion of the latch spring, closes a flash channel from the relay charge to the gaine. The gaine threads into the lower portion.

Operation: On set-back the arming collar moves down, engaging the ears of the latch spring. During deceleration, the coiled spring raises the arming collar and latch spring, freeing the shutter, which moves out with centrifugal force and leaves the flash channel open.

Figure 331 – Auxiliary Detonating Fuze.