#10-24 x 1/2" Unslotted Indented Hex Washer Head Thread Cutting Screw, Type T, Zinc / THREAD CLASS: 3A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 0.500 INCHES NOMINAL FASTENER LENGTH: 0.500 INCHES NOMINAL HEAD STYLE: C7 HEXAGON EXTENDED WASHER HEAD HEIGHT: 0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM WIDTH BETWEEN FLATS: 0.305 INCHES MINIMUM AND 0.312 INCHES MAXIMUM EXTENDED WASHER DIAMETER: 0.384 INCHES MINIMUM AND 0.414 INCHES MAXIMUM EXTENDED WASHER THICKNESS: 0.019 INCHES MINIMUM AND 0.031 INCHES MAXIMUM WASHER QUANTITY: 1 INTERNAL DRIVE STYLE: D21 W/O INTERNAL DRIVE NOMINAL THREAD DIAMETER: 0.190 INCHES THREAD QUANTITY PER INCH: 24 PRIMARY WASHER OUTSIDE DIAMETER: 0.384 INCHES MINIMUM AND 0.414 INCHES MAXIMUM PRIMARY WASHER STYLE: G30 FLAT PRIMARY WASHER MATERIAL THICKNESS: 0.019 INCHES MINIMUM AND 0.031 INCHES MAXIMUM PART NAME ASSIGNED BY CONTROLLING AGENCY: UNSLOTTED INDENTED HEX WASHR HEAD THREAD CUTTING SCREW MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM F1941, FE/ZN 3AT ASSN STD SINGLE TREATMENT RESPONSE OVERALL THREAD SERIES DESIGNATOR: UNC