MRC:
A recording of the physical,functional,and performance characteristics for an item of supply.TEXT
General Description:
Steel, chrome-molybdenum, 4140, per mil-s-5626, normalized; chromium plated per qq-c-320, class 2, type 2, 0.002 in. Min thk, 0.004 in. Maximum thk; heat treated per mil-h-6875 to rockwell c scale 40.0 min, 46.0 max; 7.500 in. lg; 2.990 in. Min, 2.992 in. Maximum w; 1.740 in. Min, 1.742 in. Maximum h; 3 holes one end, ctr 1.000 in. Fm one edge along w, ctr 1.000 in. Apart; ctr hole tapped 0.875-14unf-2b, 1.000 in. Min, 1.240 in. Maximum dp; 2 holes tapped 0.190-32unf-2b, 0.380 in. Min, 0.620 in. Maximum dp; 4 grooves 0.045 in. Min, 0.075 in. Maximum dp, 4 sides across w, 0.620 in. Radius inside; chamfer 45.0 deg: opposite thd end, 0.120 in. W, and 4 edges along lg, 0.060 in. Min, 0.063 in. Maximum w; groove ctrs fm non-thd end: 1.600 in. 1st, 3.000 in. 2nd, 4.500 in. 3rd, 5.900 in. 4th; nickel plated per mil-c-26074, class 2, grade b, 0.0005 in. Min thk, under chromium plating
