1/4"-20 x 3/4" 6-Lobe Drive Truss Head Zinc Finish Steel Machine Screw - Full Thread / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 0.750 INCHES NOMINAL FASTENER LENGTH: 0.750 INCHES NOMINAL HEAD STYLE: C40 TRUSS HEAD DIAMETER: 0.546 INCHES MINIMUM AND 0.573 INCHES MAXIMUM HEAD HEIGHT: 0.133 INCHES MINIMUM AND 0.150 INCHES MAXIMUM SPLINE MINOR DIAMETER: 0.200 INCHES NOMINAL SPLINE MAJOR DIAMETER: 0.200 INCHES NOMINAL INTERNAL DRIVE STYLE: D24 TORX END ITEM IDENTIFICATION: 3930-01-599-9978 NOMINAL THREAD DIAMETER: 0.2500 INCHES THREAD QUANTITY PER INCH: 20 MINIMUM TENSILE STRENGTH: 60000 POUNDS PER SQUARE INCH PART NAME ASSIGNED BY CONTROLLING AGENCY: 1/4-20X3/4 ZINC TRUSS HEAD SIX-LOBE ASME B18.6.3 FULLY THREADED MACHINE SCREW MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: CARBON STEEL MFR REF SINGLE MATERIAL RESPONSE OVERALL SURFACE TREATMENT: ZINC OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: FE/ZN 3AT PER ASTM F1941 ASSN STD SINGLE TREATMENT RESPONSE OVERALL THREAD SERIES DESIGNATOR: UNC