"2MATERIAL 4130 steel plate, conforming to MIL-S-18729 specification, condition F; finish: cadmium plate No. 1.1.2.2 as per MIL-STD-171 requirements; one hole with an inside diameter of 0.203 inches and outside diameter of 0.390 inches; part of electro-target designator set; used on turret assembly PAVE TACK pod for F-4/F-111/RF-4 aircraft"