Dave the plumber wrote:
> is it cast into the zinc, or pressed into a slot ??
Lead, not zinc. Apparently, the lead was cast around the nipple.
One of the unusual things about the Type 2 Hotchkiss Percussion nipple is that it is made of brass. The Parrott fuze nipple and James nipple are steel. The Schenkl nipple is part of the striker itself, not a separately-made component. The most common Schenkl slider was made of cast-iron, and a smaller number were made of a solder-like alloy.
> Are the typical nipples threaded in ??
Parrot and James nipples were threaded in. Like the Schenkl striker's nipple, Confederate Percussion fuze nipples are an integral part of the striker, which was either lathed from bar-stock or solid-cast.
Regards,
Pete