#5-40 x 1" ASTM A574 Hex Drive Zinc Finish Alloy Steel Socket Cap Screw / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 0.250 INCHES NOMINAL FASTENER LENGTH: 0.970 INCHES MINIMUM AND 1.000 INCHES MAXIMUM HEAD STYLE: C48 FLAT FILLISTER HEAD DIAMETER: 0.198 INCHES MINIMUM AND 0.205 INCHES MAXIMUM HEAD HEIGHT: 0.121 INCHES MINIMUM AND 0.125 INCHES MAXIMUM INTERNAL DRIVE STYLE: D5 HEXAGON END ITEM IDENTIFICATION: 2320-01-482-8224 TRUCK, WRECKER NOMINAL THREAD DIAMETER: 0.125 INCHES WIDTH ACROSS FLATS: 0.094 INCHES NOMINAL THREAD QUANTITY PER INCH: 40 PART NAME ASSIGNED BY CONTROLLING AGENCY: SOCKET HEAD CAP SCREW MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A574 ASSN STD SINGLE MATERIAL RESPONSE OVERALL SURFACE TREATMENT: ZINC OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM F1941, FE/ZN 3AT ASSN STD SINGLE TREATMENT RESPONSE OVERALL THREAD SERIES DESIGNATOR: UNRC