3/8"-24 Grade C Zinc Finish Steel Top Lock Nut / THREAD CLASS: 2B THREAD DIRECTION: RIGHT-HAND LUBRICATION: WAX NUT STYLE: A12 HEXAGON NUT HEIGHT: 0.320 INCHES MINIMUM AND 0.415 INCHES MAXIMUM END ITEM IDENTIFICATION: TOW TRACTOR, AIRCRAFT ASSEMBLY, SHIFT LINKA ASSEMBLY, CONVERTER; TOW TRACTOR, A/C (P/N 4JPAV, PCC 6J9) WIDTH ACROSS FLATS: 0.551 INCHES MINIMUM AND 0.565 INCHES MAXIMUM THREAD SERIES: UNF THREAD QUANTITY PER INCH: 24 NOMINAL THREAD SIZE: 0.375 INCHES PART NAME ASSIGNED BY CONTROLLING AGENCY: NUT, LOCK 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 ASSN STD SINGLE TREATMENT RESPONSE OVERALL