DESCRIPTION. The igniter consists of a lead tube or sheath connected to a threaded brass fitting by a steel tube. The steel tube is threaded on both ends and contains the powder delay pellet. The lead sheath contains a copper capsule which holds the friction composition. A friction wire is coiled to provide resistance to pulling and is joined to the pull loop. The pull loop extends through the lead tube, which is flattened or pressed to-gether at the upper end, thus preventing the loop and friction wire from being freely and inadvertently withdrawn. A protective cap which protects the delay pellet must be remo-ved before using the igniter. A colored band at the base of the lead sheath is presumed to identify the type of delay pellet contained. The NbBZ-38 has a white band for purpo-ses of identification. (See fig. 249.)

OPERATION. When the loop is pulled, it frees itself from the soft lead tube, drawing the friction wire through the friction composition contained in the capsule. The resulting flame ignites the delay pellet. When the delay pellet burns through, it ignites a fuze or a detonator attached to the fitting. The pellet used with the stick grenade has a delay of 4 1/2 second.

EMPLOYMENT. This igniter is used with the German "stick" grenade and also the smoke grenade. When used with the stick grenade, the entire igniter is screwed into the head end of the handle by means of the threads on the fitting. The loop is attached to the trip cord in the handle of the grenade.

The igniter used with the stick grenade is marked "BZ-24" and the igniter used with the smoke grenade is the NbBZ-38.

Figure 249 – BZ-Friction Igniter Pull Type; NbBZ-38 Friction Pull Type