#6-20 x 1/2" Phillips Drive Flat Head Black Oxide Finish Type AB Point Steel Sheet Metal Screw / FASTENER LENGTH: 0.50 INCHES NOMINAL HEAD STYLE: C53 FLAT TOP ELEVATOR INTERNAL DRIVE STYLE: D1 CROSS RECESS TYPE 1 NONMACHINE THREAD STYLE: A13 GIMLET POINT (TYPE A, AB OR BA) NONMACHINE NOMINAL THREAD DIAMETER: 0.138 INCHES PART NAME ASSIGNED BY CONTROLLING AGENCY: SHEET METAL SCREW COLOR: BLACK OVERALL MATERIAL: STEEL OVERALL SURFACE TREATMENT: BLACK CHEMICAL FINISH OVERALL