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David R. · 01-01-2021, 07:14 AM

I busted porcelain out of an old plug and then threaded the hole with pipe thread tap and adapted to gauge thread.

01-01-2021, 07:14 AM	#5
David R. Senior Member Join Date: Aug 2016 Location: West Virginia Posts: 430	Re: Compression tester I busted porcelain out of an old plug and then threaded the hole with pipe thread tap and adapted to gauge thread.