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I need to locate a .5634-32 six fluted finish tap. Also looking for a facing cutter for the 38 Special
(for Colt Police Positive). Colt Manufacturing does not have any information, neither does Brownell's. Any information would be appreciated.
Thanks,
Precept
You will probably have to cut those threads on a lathe.
You're asking for a "tap," and not a "die," so I am assuming that you want to put threads into a hole, for instance in a receiver or frame, rather than onto a barrel.
The lathe setup to do this is difficult, and it is not something to be attempted by the faint-of-heart. I suggest that you need to consult an extremely experienced machinist.
(There might exist such a thing as a 1/2"-32 tap, and that might be close enough. You would probably want an interference fit anyway, if you're seating a barrel. Consult a machinist-supply house for that size of tap. You should be able to find one on the web.)