Material steel, qq-s-793, cl 416, cond a; heat treated ps 197 to rc 28 to rc 32; o/a dim. 0.374 to 0.378 in. Outside dia, 0.123 to 0.127 in. Thk; 1 hole 0.112 in. Diameter 4-48 unf thru, chamfered 15 degrees by 0.010 in. Both sides; 1 slot 0.020 to 0.023 in. W, 0.092 to 0.098 in. Dp, 0.374 to 0.378 in. Lg