3/8"-16 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: 0.438 INCHES MINIMUM AND 0.468 INCHES MAXIMUM END ITEM IDENTIFICATION: AIR WHEELED T WIDTH ACROSS FLATS: 0.551 INCHES MINIMUM AND 0.565 INCHES MAXIMUM THREAD SERIES: UNC THREAD QUANTITY PER INCH: 16 NOMINAL THREAD SIZE: 0.375 INCHES BEARING SURFACE TYPE: WASHER FACED MATERIAL: PLASTIC POLYAMIDE LOCKING INSERT MATERIAL: STEEL NUT SURFACE TREATMENT: ZINC NUT