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+--- Thread: Horn button thread (/showthread.php?tid=2924)
Horn button thread - Chris KC - 09-06-2019
Without going to a lot of trouble is anyone able to tell me what screw thread is on a Chummy-type horn button please?
RE: Horn button thread - Austin in the Shed - 13-06-2019
The thread is .671" dia on a '27 chummy and .673" dia measured on a '30 RK. 32 TPI pitch.
RE: Horn button thread - Chris KC - 13-06-2019
Thank you Austin. In the lull since I posted the question I have been in touch with the supplier of replacement buttons who tells me they are 11/16" x 32 TPI, so that sounds about right, allowing for 90-odd years of wear.
RE: Horn button thread - Austin in the Shed - 13-06-2019
I used to make them for Mick Kirkland many years ago.