This is a brand new stainless steel endshake or yoke screw (domed head) for Smith & Wesson K, L, and N frame revolvers. Two are required per side plate. When used as an endshake or yoke screw, it usually requires fitting. These fit the earlier versions where the side plate screw hole is the same size as the other two (models made in 1987 and before - the yoke change occurred in 1988 requiring a larger yoke screw with built in spring and plunger - we do not carry those). Fits models: 64, 65, 66, 67, 610, 624, 625, 629, 648, 657, 681, 686, and maybe more.
We also sell a complete side plate set in our other auctions (1 side plate screw and 2 yoke screws) here.