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Re: Rear sight base threads

Posted by Cary on Wednesday, 16 February 2011, at 2:09 p.m., in response to Re: Rear sight base threads, posted by Ernie Brandt on Wednesday, 16 February 2011, at 7:54 a.m.

Ernie,

The taps are from www.tracytools.com They are out of the UK and have several 26 TPI taps available. I went ahead and tried to figure out the size equivalents based on Pete's info on thread sizes. The measurements listed for are difficult to translate to available sizes. You can get 1/8 x 26 and 3/16 x 26 taps, but who knows if they are close enough for the trapdoor screws? I am taking a chance ordering the 5/32 x 26 taps, but it is only a few thousannds off based on Pete's info and my measurements this AM. The threads on the original fittings are relatively round as compared to newer fittings which appear triangular. The HSS taps are 9 pounds each! Russell is the chap who assisted me. Cary


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