Anyone know what the barrel shank thread size is for a Marlin 336, caliber 30-30?

Thanks,
ASS_CLOWN

A/C From as new take, off,Sn V 26XXX, 30-30, M 336.

Thd. 12 T.P.I., SQUARE FORM. Major Dia. .775+ -,
Minor Dia. .717".
Thd.tennon Lngth .850
Chamber wall thickness (avg by caliper) .140- to minorT.D.
Barrel thread was milled, not deburred, nor "fins" removed. The Receiver did not peel these off from spinning barrel in. This means make trial plug for individual receiver. If thread were a true square, the Major dia. then ought to
be .787 or more. There were rub marks on the minor dia.

Thanks!!