1/4"-20 x 3/4" Zinc Finish Grade 8.2 Hex Serrated Flange Bolt / THREAD CLASS: 2A THREAD DIRECTION: RIGHT-HAND THREAD LENGTH: 0.750 INCHES NOMINAL FASTENER LENGTH: 0.750 INCHES NOMINAL HEAD STYLE: C116 CHAMFER SERRATED FLANGE HEAD HEIGHT: 0.280 INCHES MAXIMUM WIDTH BETWEEN FLATS: 0.367 INCHES MINIMUM AND 0.375 INCHES MAXIMUM EXTENDED WASHER DIAMETER: 0.560 INCHES MAXIMUM END ITEM IDENTIFICATION: 4320-01-617-7587 NOMINAL THREAD DIAMETER: 0.250 INCHES THREAD QUANTITY PER INCH: 20 PART NAME ASSIGNED BY CONTROLLING AGENCY: HEX FLANGE BOLT SERRATED, GRADE 8.2 MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL THREAD SERIES DESIGNATOR: UNC