Smith & Wesson Thumbpiece Nut, Glass Beaded

FITS: 60, .38, .357; 63, .22; 317, .22; 331TI, .32 Mag; 332TI, .32 Mag; 337TI, .38; 342TI, .38; 631/631 LS, .32 Mag; 632, .32 Mag; 637, .38; 637-1, .38; 638, .38; 638-2, .38; 640, .38; 640 Magnum, .357; 642-1, .38; K Frame – Common Parts, .