1/4"-20 x 3/4" ASTM F593 18-8 Stainless Steel Hex Cap Screw / THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 0.750 INCHES NOMINAL FASTENER LENGTH: 0.750 INCHES NOMINAL HEAD STYLE: C1 HEXAGON WIDTH BETWEEN FLATS: 0.4375 INCHES NOMINAL END ITEM IDENTIFICATION: 6640-015471760 NOMINAL THREAD DIAMETER: 0.250 INCHES THREAD QUANTITY PER INCH: 20 PART NAME ASSIGNED BY CONTROLLING AGENCY: SCREW, CAP, HEXAGON HEAD MATERIAL: STEEL CORROSION RESISTING OVERALL THREAD SERIES DESIGNATOR: UNS