This is a brand new blued steel strain screw for Smith & Wesson K, L, and N frame round-butt revolvers that use the flat-leaf type mainspring. Measures .505" OAL and .380" under the head. Fits models: K-22, K-38 (Army 38/200, 38 S&W, Victory, & British), M&P, 1917, 10, 12, 13, 14, 15, 16, 17, 18, 19, 24, 25, 27, 28, 29, 48, 57, 581, 586, and maybe more!
I have the longer square-butt screws here.
