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14th Apr 2019, 09:54 AM #16Most Valued Member
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14th Apr 2019, 10:54 AM #17Most Valued Member
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I found this on a British fastener supplier's website. Note the last sentence. If it's a British brass thread, and even in Britain you have to special order it, I'd say your chances of finding it in mild steel are virtually non-existent.
BRITISH STANDARD BRASS
BRASS THREADS (British Standard Brass)
Because brass tubing has a uniform wall thickness, irrespective of the tube diameter, any thread cut on, (or in) it, would
have to have the same depth, so 26 tpi is standard on all diameters. An example would be the thread cut on the brass
trumpet horns of the 30s cars, although many were die-cast rather than brass. If it were 1" O/D, the thread would be 1"
Brass, 26tpi.
BSB has a 26 TPI pitch through the whole range and is often confused with BS Cycle thread the difference being that brass thread has an angle of 55 degrees whereas Cycle is 60 degrees. Brass threads are usually confined to fittings and adjusters on cables.
Brass thread taps and dies are sold and advertised as 26 tpi and are identified by the letters BSB.
These are a special order item.Chris
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14th Apr 2019, 02:48 PM #18Senior Member
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Thanks Michael---I'm off to follow your link
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14th Apr 2019, 02:52 PM #19Senior Member
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Thanks Jack
I think that is a good heads up that Im not going to achieve anything useful
I guess I will have to set about sorting this out from another angle
My intention was to knock up a simple seating die to fit a super simplex reloading press for an outdated calibre where I may (or may not) decide to load a few (very few) rounds to try out
Not worth the cost of buying dies on ebay
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14th Apr 2019, 06:49 PM #20Most Valued Member
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15th Apr 2019, 08:09 AM #21Senior Member
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Thanks PWD,
I will send you a note
regards
Brian
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