Over-all length

Maxiumum diameter

Thread diameter

Markings

This fuze is very similar in appearance and operation to Percussion Fuzes M10 and M17. The cylindrical brass body is screw-threaded throughout its length for inser-tion in the shell and has a flange at its head, which is the only part extending from the fuzed shell. A screw-threaded hole in the head receives a detonator holder and leads to the interior recess containing the striker with the firing pin attached. The diameter of this recess is increased to form a shoulder near the base which locates the retaining collar. Below the shoulder, the base is screw-threaded to receive the black-powder charge. The flash-hole is blocked by a plug with an enlarged to seat in the chamfered upper side of the hole in the base plug. The upper portion of the plug is threaded and has a stirrup spring secured at its base in a nut. The stem also passes through the central hole in the striker and is secured to it by a nut. The striker ist cylindrical, with the firing pin attached at its for-ward end and four holes drilled through the base.

On firing, the arming ring sets back against its stirrup spring. The striker is now held by the closing plug and its stirrup. The closing plug sets back and blocks the flash channel during acceleration. On impact the striker moves forward, drawing with it the closing plug and its stirrup spring. The flash-hole is opened; the firing pin hits the detonator; and the flash passes through the striker to the flash-hole in the base.

Figure 201
Percussion Nose Fuze for 65/17 H.E.