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Re: Rear sight base threads
Posted by Pete Nelson on Tuesday, 15 February 2011, at 12:42 p.m., in response to Re: Rear sight base threads, posted by Cary on Tuesday, 15 February 2011, at 11:42 a.m.
I owe you an apology - - I was getting way ahead of myself. It does not pay to try to answer TRAPDOOR questions in the middle of doing my FEDERAL and PENNSYLVANIA STATE Income Taxes - - although the TRAPDOOR part is admittedly a lot more fun). The only two tap-and-die combinations that are in that set I have are the 0.187"-26 (for the HAMMER SCREW, SEAR SCREW, SEAR SPRING SCREW, and BRIDLE SCREW) and the 0.197"-26 (for the 2 Lock Plate Screws). Apparently what I had done with the two bad Rear Sight Screws (the 0.171"-26) - - if I remember correctly - - was to slightly shave down the a brand-new #8-32 standard tap and then very carefully broke off the lead-in and hand-filed the end flat to square it off for use as a "bottoming tap.. Earlier I had tried taking an original Springfield slotted-head Rear Sight Screw (I had a bunch of both the slotless type and a few which had had slots filed in them) and flame hardening it to make a "pseudo-tap". I hand-filed the lead-in thread slightly, but I was not able to get it started inmto the hole. It took quite a bit of VERY CAREFUL hand-working but I was finally able to clean-up the lead-in on the one bad hole to the point where I could run the proper M1884 BUFFINGTON Sight Screw in sufficiently to hold the Sight snugly.
I apologize for the mix-up, but I was getting my facts mixed up. But I do indeed have the other two sized tap-and-die pairs and gthey work just fine. Now perhaps my good friend Ernie Brandt will have some better ideas.
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