BBI 221100 Shoulder Screw, Round Socket Head, ASTM A574 Alloy Steel, 1/2 in Dia x 1/2 in L Shoulder, 3/8-16

BBI Shoulder Screw, Measurement System: Imperial, Round Socket Head, ASTM A574 Alloy Steel, 1/2 in Shoulder Diameter, 1/2 in Shoulder Length, 3/8-16 Thread, Hex Drive, 1/4 in Drive, UNC Thread, HRC 36-43 Hardness, Plain/Thermal Black Oxide