Item made of corrosion resistant steel 17-4 ams 5643 cond a, item measures 0.51 in. Diameter, 0.13 in. Deep, heat treat per mil-h-6875 to condition h1025 rockwell c 35-42, passivate per finish 5.4.1 of mil-std-171 and black oxide per class 4 of mil-c-13924
