Insulated Captive Thumb Nut: Brass Finish: Model 2440 Tin plated brass Insulation: Polycarbonate. Color: One black and one red Mounting Base: Polycarbonate. Marking: “POMONA ELECTRONICS CALIF. Insulator: Polycarbonate. One black and one red Lockwasher: Steel. Finish: Nickel plated per QQ-N-290, Class 2, 200/300 microinches Hex Nut: Brass. Finish: Nickel plated per QQ-N-290, Class 2, 200/300 microinches. Binding Post: Brass, Alloy 360, ½ Hard. Finish: Gold plated per MIL-G-45204, Type II, Class 00 over electroless nickel pr MIL-C-26074
