Material: alloy steel aisi-4340; surface treatment: heat treat to 40-45 rockwell-c in accordance with mil-h-6875. Magnetic particle inspect entire item per mil-std-1907,grade a. Apply protective coating dod-p-16232, type m, class 1. Finish coat all surfaces with .0002-.0005 thick solid film lubricant mil-l-46010;
Ams-5604 assn std single material response or mil-h-6875 mil spec single material response
Material cres aisi ty 17-17ph;heat treat in accordance mil-h-6875, age temper at 1050 deg f porm 10 deg f for 90 minutes minimun; penetrant inspect per mil-std-6866 or magnetic particle inspect per mil-std-1949; no cracks or linear indications permitted