This is a brand new stainless side plate screw (flat top) for Smith & Wesson J, K, L, and N frame revolvers. This is the back side plate screw (only 1 required per side plate, the other two are yoke/endshake screws that I have in my other auctions). Fits models: 64, 65, 66, 67, 610, 617, 624, 625, 629, 648, 657, 681, 686, and maybe more.
We also sell a complete side plate set (1 side plate screw and 2 yoke screws for the K L and N frames only as the J frame domed-head screws are different) here.