1/4"-20 x 1-1/4" Phillips Drive Flat Head Zinc Finish Steel Machine Screw / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 0.097 INCHES NOMINAL FASTENER LENGTH: 1.250 INCHES NOMINAL HEAD STYLE: A39 FLAT COUNTERSUNK HEAD DIAMETER: 0.442 INCHES MINIMUM AND 0.477 INCHES MAXIMUM HEAD HEIGHT: 0.153 INCHES NOMINAL INTERNAL DRIVE STYLE: B1 CROSS RECESS TYPE 1 END ITEM IDENTIFICATION: 2320-01-528-6294 TRUCK,TANK (HEWATT) NOMINAL THREAD DIAMETER: 0.250 INCHES THREAD QUANTITY PER INCH: 20 MINIMUM TENSILE STRENGTH: 60000 POUNDS PER SQUARE INCH PART NAME ASSIGNED BY CONTROLLING AGENCY: MACHINE SCREW,FLAT HEAD,CROSS RECESSED,ZINC PLATED SCREW MATERIAL: STEEL SCREW MATERIAL DOCUMENT AND CLASSIFICATION: ASME B18.6.3 ASSN STD SINGLE MATERIAL RESPONSE HEAD SURFACE TREATMENT: ZINC SCREW SURFACE TREATMENT: ZINC SHANK SURFACE TREATMENT: ZINC SCREW SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: FE/ZN PER ASTM F1941 ASSN STD SINGLE TREATMENT RESPONSE