3/8"-24 ASTM A563 Grade A Zinc Finish Steel Jam Nut / THREAD CLASS: 2B THREAD DIRECTION: RIGHT-HAND NUT STYLE: A12 HEXAGON NUT HEIGHT: 0.210 INCHES MINIMUM AND 0.227 INCHES MAXIMUM END ITEM IDENTIFICATION: TOW TRACTOR, AIRCRAFT ASSEMBLY; FRONT AXLE ASSEMBLY; BRAKE LEVER TOW TRACTOR, A/C (P/N 4JPAV, PCC 6J9) WIDTH ACROSS FLATS: 0.551 INCHES MINIMUM AND 0.562 INCHES MAXIMUM THREAD SERIES: UNF THREAD QUANTITY PER INCH: 24 NOMINAL THREAD SIZE: 0.375 INCHES PART NAME ASSIGNED BY CONTROLLING AGENCY: NUT, JAM; 3/8 IN - 24 ZINC PLATED HEX JAM NUT MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: ASTM A563 ASSN STD SINGLE MATERIAL RESPONSE OVERALL SURFACE TREATMENT: ZINC OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM F1941 ASSN STD SINGLE TREATMENT RESPONSE OVERALL