7/16"-14 Grade C Zinc Finish Steel Top Lock Nut / THREAD CLASS: 2B THREAD DIRECTION: RIGHT-HAND LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN LUBRICATION: WAX NUT STYLE: A12 HEXAGON NUT HEIGHT: 0.365 INCHES MINIMUM AND 0.463 INCHES MAXIMUM END ITEM IDENTIFICATION: SPECIAL AIRCRAFT AND ENGINE TOOL AND SUPPORT EQUIPMENT/PARTS; TOW TRACTOR, AIRCRAFT; TRANSMISSION ASSY; ASSEMBLY, DRIVE SHAFT; TOW TRACTOR, A/C (P/N 4JPAV, PCC: 6J9); MRAP - COUGAR WIDTH ACROSS FLATS: 0.675 INCHES MINIMUM AND 0.690 INCHES MAXIMUM THREAD SERIES: UNC THREAD QUANTITY PER INCH: 14 NOMINAL THREAD SIZE: 0.438 INCHES BEARING SURFACE TYPE: FLAT OR CHAMFERED PART NAME ASSIGNED BY CONTROLLING AGENCY: INAVY: NUT, LOCK 7/16-14; DRAWING: 7/16-14, TOP LOCK NUTS, IFI 100/107 GRADE C, MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: IFI-100/107 GRADE C ASSN STD SINGLE MATERIAL RESPONSE OVERALL SURFACE TREATMENT: ZINC OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM F1941 FE/ZN WITH LUBRICANT SUCH AS WAX ASSN STD SINGLE TREATMENT RESPONSE OVERALL