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NNTP-Posting-Date: Mon, 21 Apr 2025 21:26:49 +0000
From: Joe Gwinn <joegwinn@comcast.net>
Newsgroups: rec.crafts.metalworking
Subject: Re: A big ol' chunk of delrin
Date: Mon, 21 Apr 2025 17:26:48 -0400
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On Mon, 21 Apr 2025 17:17:42 -0400, "Jim Wilkins"
<muratlanne@gmail.com> wrote:

>"Joe Gwinn"  wrote in message 
>news:d67d0k1b0fms28q1afa8madabr02umtm7t@4ax.com...
>
>From the discussion, I'd guess that it may be a ISO Trapezoidal
>thread, specifically TR24x3.
>
>.<https://www.engineersedge.com/hardware/iso-metric-trapezoidal-threads1.htm>
>------------------------------
>The Acme thread flank angle is 29 degrees, trapezoidal is 30.

Yes, but a little bit of wear will erase the distinction.

Joe