Material: alloy steel uns g43400; surface treatment: apply protective coating in accordance with mil-dtl-16232, type m, class 1. Finish coat all surfaces with .0002-.0005 thick solid film lubricant in accordance with mil-prf-46010. Magnetic particle inspect entire item in accordance with mil-std-1907, grade a. Heat treat to 30-35 rockwell-c in accordance with sae ams-h-6875, class a;