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#630792 05/29/23 04:24 PM
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Sidelock
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Did the English makers use a standard thread pitch for hammergun nipples? If not, what were some of the pitches in use for the part around the 1860-1880? Thank you.

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BS,,,? I pulled the firing pin on my 1878 greener hammer gun I have apex tap and dies that are English and 5/16.x27 is close the problem is the greener threads are shallow and rounded .sirry not more help

mc #630819 05/30/23 08:31 AM
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Sidelock
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I may just find some close to the other one, but American. The gun is a 12b Joseph Lang from 1867 that was modified to be sleeved as a rimfire. A big off center hole was bored into the left fence to accommodate an insert. I’m plugging said hole, and then milling for a new nipple and firing pin.

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Sidelock
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Bill,
mc started his answer with BS,,,? I think he is referring to "British Standard" thread form, which is rounded as he described. You may be able to find taps and dies at your local hobby shop.
Mike

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Thank you. I have a BA set. They’re not in front of me, but I think they are smaller set. Will check.

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Sidelock
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I think the Whitworth thread form is also rounded, you might find one of those that is close enough.
Mike

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Sidelock
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An interesting topic ( I was going to say thread, but that could have caused confusion?).
Many gunmakers used what was readily available at the time, which could be BA or BC .
BC is British Cycle thread which was used extensively , especially by Birmingham gunmakers.

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The Internet may be your friend ?
Lots of information on thread and threadforms .
A very good handbook is the catalogue available free from Tracey Tools Torquay England UK.

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Simple answer .NO . Old British gunmakers never had " standard" anything on actions .


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