MRC:
A recording of the physical,functional,and performance characteristics for an item of supply.TEXT
General Description:
Steel alloy, astm a331-74, 4140, cold finished, 0.15-0.35 per cent lead permitted; surface roughness is 125.000 microinches; heat treatment: mil-h-6875, quench and temper to 23-32 rockwell c, induction harden area indicated only to 45-50 rockwell c from 0.06 to 0.25 in. Deep; manganese phosphate, mil-p-16232, type m, class 1; 3.570 in. Lg.; 2.770 in. Dia.; 3 equally spaced holes, 0.285 in. Dia.
