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antique lamp socket screw
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  1. Electrical
    Hello, I have some vintage lamp sockets Made in U.S.A., but I am missing set screws for a few sockets, I checked pitch of its part by a inch screw pitch gauge, it is 40 threads per inch (not 8-32) I also checked all thread diameter is approx.0.1595" I want to know the correct size of set screw...
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