9/16"-12 Grade 2 Zinc Finish NE Steel Nylon Insert Lock Nut / THREAD CLASS: 2B THREAD DIRECTION: RIGHT-HAND LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT NUT STYLE: A12 HEXAGON NUT HEIGHT: 0.656 INCHES NOMINAL END ITEM IDENTIFICATION: F-15SA WIDTH ACROSS FLATS: 0.875 INCHES NOMINAL THREAD SERIES: UNC THREAD QUANTITY PER INCH: 12 NOMINAL THREAD SIZE: 0.562 INCHES PART NAME ASSIGNED BY CONTROLLING AGENCY: ZINC FINISH NE GRD 2 NYLON INSERT LOCK NUT MATERIAL: PLASTIC POLYAMIDE LOCKING INSERT MATERIAL: STEEL NUT SURFACE TREATMENT: ZINC NUT