1"-8 x 4-1/2" Grade 8 Plain Finish Hex Cap Screw / THREAD DIRECTION: RIGHT-HAND FASTENER LENGTH: 4.50 INCHES NOMINAL HEAD STYLE: C1 HEXAGON HEAD DIAMETER: 1.50 INCHES NOMINAL NOMINAL THREAD DIAMETER: 8.00 INCHES PART NAME ASSIGNED BY CONTROLLING AGENCY: CAP SCREWS OR HEX BOLTS SPECIAL FEATURES: PLAIN MATERIAL: STEEL CORROSION RESISTING FASTENER THREAD SERIES DESIGNATOR: UNC