3/4"-16 ASTM A563 Grade A Plain Finish Steel Jam Nut / THREAD CLASS: 2B THREAD DIRECTION: RIGHT-HAND NUT STYLE: A12 HEXAGON NUT HEIGHT: 0.422 INCHES NOMINAL END ITEM IDENTIFICATION: 3930-01-599-9978 WIDTH ACROSS FLATS: 1.088 INCHES MINIMUM AND 1.125 INCHES MAXIMUM THREAD SERIES: UNF THREAD QUANTITY PER INCH: 16 NOMINAL THREAD SIZE: 0.750 INCHES BEARING SURFACE TYPE: FLAT PART NAME ASSIGNED BY CONTROLLING AGENCY: HEX JAM NUT MATERIAL: STEEL OVERALL