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Posted: Sat Sep 09, 2017 11:05 am
by chas1949
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Re: M8 and M81 barrel thread sizes
Posted: Thu Sep 14, 2017 7:47 pm
by Fred
I measured my M81 35Rem barrel at Ø.600-24 for the nut. You'd do better with a lathe I think. Custom taps/dies are not inexpensive.
Re: M8 and M81 barrel thread sizes
Posted: Fri Sep 15, 2017 10:15 am
by Phyrbird
Yeah, we have wasted a lot of time & research, I don't think anyone is making the taps or dies now. And know that many of the threads were designed before anyone dreamed of SAE standards.
Re: M8 and M81 barrel thread sizes
Posted: Fri Sep 15, 2017 11:38 am
by Fred
About any job shop should be able to cut a steel stub to fit the barrel nut threads snugly, then cut some flutes in the stub allowing for debris someplace to go to. Should be good enough to clean out existing threads. One would think that that sort of work would be fairly inexpensive to complete. It pays to shop around.