EMPLOYMENT: Nose fuzes used in German 20-mm ammunition. (See fig. 533.)

Over-all length: 1.094 inches.

Maximum diameter: 0.750 inch.

Threaded length: 0.375 inch.

Number of threads: 9 RH.

CONSTRUCTION: The steel body has a closing disk in the nose and threads on the base of the fuze for engaging the projectile. A detonator screws into a recess in the base of the fuze body.

Inside the fuze body, a striker holder keeps the striker out of line with the detonator. This holder is kept from moving down by two detents attached to a split ring which sur-rounds the holder.

A small steel ball rides in a slot below the striker holder and keeps it in the offset positi-on.

ACTION: Centrifugal force opens the split ring withdrawing the detends from the striker holder. During deceleration, the small ball creeps forward into a recess in the top of the striker holder. The holder is then free to move over bringing the striker in line with a cen-tral channel so that, on impact, it may pierce the detonator.

REMARKS: The only difference between the A.Z. 1503 and the 1504 is that the 1504 is made of aluminum not steel.

Figure 553 – A.Z. 1503 and A.Z. 1504