1/2"-20 Grade C Zinc Finish Steel Top Lock Nut / THREAD CLASS: 2B THREAD DIRECTION: RIGHT-HAND LUBRICATION: WAX NUT STYLE: A12 HEXAGON NUT HEIGHT: 0.427 INCHES MINIMUM AND 0.573 INCHES MAXIMUM END ITEM IDENTIFICATION: 2355-01-529-2246, MINE RESISTANT VEHICLE WIDTH ACROSS FLATS: 0.736 INCHES MINIMUM AND 0.752 INCHES MAXIMUM THREAD SERIES: UNC THREAD QUANTITY PER INCH: 20 NOMINAL THREAD SIZE: 0.500 INCHES PART NAME ASSIGNED BY CONTROLLING AGENCY: 1/2-20 GRADE C ZINC PLATED TOP LOCK NUT MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: IFI 100/107 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL SURFACE TREATMENT: ZINC OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM F1941, FE/ZN 3 AT ASSN STD ALL TREATMENT RESPONSES OVERALL SUPPLEMENTARY FEATURES: THREAD REQUIREMENTS0 ANSI B1.1, UNC OR UNF; GRADE C STEEL EQUIVALENT TO GRADE 8; WRENCH SIZE-3/4 IN; WEIGHT-0.0346 LBS