1/2"-13 Grade 8 Yellow Zinc Finish NE Steel Nylon Insert Lock Nut / THREAD CLASS: 2B THREAD DIRECTION: RIGHT-HAND NUT STYLE: A8 SINGLE BALL SEAT, HEXAGON NUT HEIGHT: 0.579 INCHES MINIMUM AND 0.609 INCHES MAXIMUM WIDTH ACROSS FLATS: 0.736 INCHES MINIMUM AND 0.752 INCHES MAXIMUM THREAD SERIES: UNC THREAD QUANTITY PER INCH: 13 NOMINAL THREAD SIZE: 0.500 INCHES THREAD TOLERANCE CLASS: 2B INTERNAL PART NAME ASSIGNED BY CONTROLLING AGENCY: NYLOCK NUT MATERIAL: PLASTIC NYLON LOCKING INSERT MATERIAL: STEEL OVERALL EXCEPT INSERT SURFACE TREATMENT: ZINC OVERALL EXCEPT INSERT