1-1/2"-6 Zinc Finish Grade 5 Finished Hex Nut / THREAD CLASS: 2B THREAD DIRECTION: RIGHT-HAND NUT STYLE: A12 HEXAGON NUT HEIGHT: 1.245 INCHES MINIMUM AND 1.312 INCHES MAXIMUM WIDTH ACROSS FLATS: 2.175 INCHES MINIMUM AND 2.250 INCHES MAXIMUM THREAD SERIES: UNC THREAD QUANTITY PER INCH: 6 NOMINAL THREAD SIZE: 1.500 INCHES BEARING SURFACE TYPE: FLAT THREAD TOLERANCE CLASS: 2B INTERNAL PART NAME ASSIGNED BY CONTROLLING AGENCY: HEXAGON NUT MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: SAE J995 ASSN STD SINGLE MATERIAL RESPONSE OVERALL SURFACE TREATMENT: ZINC OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM F1941 ASSN STD SINGLE TREATMENT RESPONSE OVERALL