BBI 201018 Button Socket Cap Screw, #4-40, 3/8 in OAL, Alloy Steel, 3A Grade

BBI Button Socket Cap Screw, Measurement System: Imperial, #4-40 Thread, 3/8 in Overall Length, Alloy Steel, 3A Grade, Plain/Thermal Black Oxide, Material Specification: ASTM F835, 0.0635 in Drive, Hex Drive