Thread identification

Steve · 2007-01-25T19:29:23+00:00

Gentlemen (and Ladies of course)I have a male threaded component with what seems to be a 3/16" x 28tpi thread using my UNF pitch gauge and digital caliper.When I originally tried the identication, I only had the female part and thought it was 5mm x 0.8 pitch then 10-32 UNF, but I was wrong.Having just surfed this looks like a UNS thread. That is 10-28 UNS with a diameter of 0.1890". This is a series I have never heard of until now.Can anyone confirm this theory? It belongs to a stainless steel clamp designed to hold PTFE ball joints together in air emissions testing equipment.Where would I get a spiral pointed machine tap from in UK? I can't see one on J&L.Thanks in anticipationSteve (Sheffield)

Jan 25, 2007 21 Replies

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Steve 19 years ago

Mike

Great idea, I was looking at the thread guage as well as the offending thread. I will borrow a new 1BA tap from my dad tomorrow and have another look.

Steve

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Steve 19 years ago

Gents

Last one on this thread - I hope, pun not intended.

I made a long 1BA 'nut' today on Dad's Super 7. This screws on the offending male thread, but has the headache as you might expect as the male is seriously undersize on OD.

Thanks for all the help

Steve (Sheffield)

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