Numrich Gun Parts Winchester Telescope Sight Base Plug Screw This is for 1 sight base plug screw Fits WINCHESTER 52C,100,61,69A,75 - WINCHESTER 70 POST 64 SERIES - WINCHESTER 70 PRE 64,70 PRE 64 FEATHERWEIGHT & MARKSMAN - WINCHESTER 88, 310, 320 - WINCHESTER 94 POST 64 TOP EJECT SERIES 0.13" dia. 6-48 Thread