Over-all length: 8 inches.

Length (without gaine): 5 7/8 inches.

Maximum diameter: 2 11/16 inches.

Threaded length: 2 inches.

Number of threads: 12, right-hand.

Construction: The fuze body is threaded externally to fit into the base plate and inter-nally to receive the setting-dial piece in the base and the gaine in the forward end. Within the fuze body are housed the striker sleeve, centrifugal detents, striker, creep spring, primer, delay train, and shutter.

The striker sleeve is operated externally from the base of the fuze by the setting dial and controls the position of a powder time ring which in turn determines the amount of delay. The striker rests on a creep spring and has a circumferential groove into which the cen-trifugal detents fit. The shutter housing is held in the fuze body by the gaine. The shut-ter side is held in place (thus interrupting the firing train) by two horizontal spring-loaded pins, one end of which is threaded to the shutter slide and the other end anchored to the shutter housing. There is a spring-loaded set-back pin housed in the shutter proper to provide bore safety.

Operation: When the projectile is fired, the set-back pin housed in the shutter moves, down against its spring into the shutter housing locking the shutter to the housing. As deceleration begins, the setback pin moves into the shutter and frees it to move out. With centrifugal force, the shutter slide moves out, compressing the springs of the two horizontal pins, and presents flash hole which opens the firing train. As creep sets in, two vertical pins move forward to lock the shutter slide pins in place and hold the shut-ter slide in the open position.

The centrifugal detents holding the striker move out, freeing the striker, which moves down onto the primer on impact.

Remarks: The setting dial is graduated from 5 to 200, representing 0.05 to 2 seconds delay.

Figure 343 – Type 95 Large Mk 2 Mod 1 Base Fuze.