Over-all length

Maximum diameter

Thread diameter

Markings

This fuze consists of a hollow brass body with a detonator holder screw-threaded in the forward end. The fuze screws internally into the steel head of the shell. Its striker is cy-lindrical and hollow, with a flat firing pin. The striker is held in position by a split brass arming ring. The hollow portion of the striker is filled with gunpowder.

It has been found by test that a force of 45 lb. is required in order to force the striker through the split ring; this force requirement would be reduced in flight by the centrifugal forces acting upon the split ring. It is not known if the ring sets back over the striker du-ring acceleration, thereby arming the fuze, or whether is designed to set forward through the ring upon impact. The flash from the detonator, upon impact, is transmitted to the gunpowder pellet in the striker and to the charge in the base of the fuze.

Figure 208
Percussion Nose Fuze for 37/40 A.P.