5/8"-11 Zinc Finish Grade 5 Finished Hex Nut / THREAD CLASS: 2B THREAD DIRECTION: RIGHT-HAND NUT STYLE: A12 HEXAGON NUT HEIGHT: 0.538 INCHES MINIMUM AND 0.562 INCHES MAXIMUM END ITEM IDENTIFICATION: 4320-01-617-7587 WIDTH ACROSS FLATS: 0.925 INCHES MINIMUM AND 0.941 INCHES MAXIMUM THREAD SERIES: UNC THREAD QUANTITY PER INCH: 11 NOMINAL THREAD SIZE: 0.625 INCHES BEARING SURFACE TYPE: FLAT PART NAME ASSIGNED BY CONTROLLING AGENCY: FINISHED HEX NUT, GRADE 5, ZINC PLATED MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL