EMPLOYMENT: Nose fuzes used in German 15-mm ammunition. (See fig. 557.)

Over-all length: 0.688 inch.

Maximum diameter: 0.500 inch.

Threaded length: 0.188 inch.

Number of threads: 5 RH.

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

A striker is supported in a central recess of the fuze by two half collars surrounded by a split ring. The under side of the shoulder on the striker is grooved to engage the top of the half collars holding them in place during setback.

ACTION: After set-back has been overcome, the striker creeps forward freeing the hold collars. Centrifugal force then throws the half collars and the split ring outward permit-ting the striker to pierce the detonator upon impact.

REMARKS: The A.Z. 1552 is the same fuze as A.Z. 1551 except that it is made of steel.

Figure 557 – A.Z. 1551 and 1552