"The item is manufactured from corrosion-resistant steel, specifically 17-4 AMS 5643 Cond A. It has a diameter of 0.51 inches and a depth of 0.13 inches. The heat treatment process involves MIL-H-6875 to Condition H1025 Rockwell C 35-42, while the passivation process follows Finish 5.4.1 of MIL-STD-171, and black oxide processing is done according to Class 4 of MIL-C-13924."