5/8"-11 Zinc Finish Grade 5 Finished Hex Nut - Made In USA / THREAD CLASS: 2B THREAD DIRECTION: RIGHT-HAND NUT STYLE: A12 HEXAGON NUT HEIGHT: 0.535 INCHES MINIMUM AND 0.559 INCHES MAXIMUM WIDTH ACROSS FLATS: 0.092 INCHES MINIMUM AND 0.094 INCHES MAXIMUM THREAD SERIES: UNC THREAD QUANTITY PER INCH: 11 NOMINAL THREAD SIZE: 0.625 INCHES BEARING SURFACE TYPE: FLAT THREAD TOLERANCE CLASS: 2B INTERNAL PART NAME ASSIGNED BY CONTROLLING AGENCY: FINISHED HEXAGON NUT SPECIAL FEATURES: METRIC DIMENSIONS: 15.88 MM MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: SAE J995, GRADE 5 STEEL 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