Cylindrical, Socket Head Cap Screw, 1/4"-20, Steel, Alloy Steel, Black Oxide, 4 1/2 in Length/ END ITEM IDENTIFICATION: TARGET ACQUISITION SUBSYSTEM, AN/TSQ-179 SECURING HOLE QUANTITY: 2 DESIGN FORM: PLAIN BEARINGS: NOT INCLUDED SECURING METHOD: DRILLED HOLE LIGHTENING HOLE: NOT INCLUDED CROWN FACE: NOT INCLUDED BORE FEATURE: NOT INCLUDED STYLE DESIGNATOR: A1 PLAIN