3/8"-16 Grade 5 Zinc Finish NE Steel Nylon Insert Lock Nut / THREAD CLASS: 2B THREAD DIRECTION: RIGHT-HAND NUT HEIGHT: 0.453 INCHES NOMINAL END ITEM IDENTIFICATION: MRAP - M-ATV UI WIDTH ACROSS FLATS: 0.563 INCHES NOMINAL THREAD SERIES: UNC THREAD QUANTITY PER INCH: 16.0 NOMINAL THREAD SIZE: 0.38 INCHES PART NAME ASSIGNED BY CONTROLLING AGENCY: NUT, HEX, LKNY .38-16 G5 ZP SPECIAL FEATURES: STYLE: SINGLE BALL SEAT, HEXAGON; WIDTH ACROSS THE CORNERS: 0.650 IN.; LOCKING FEATURE: NYLON INSERT MATERIAL: PLASTIC NYLON OVERALL AND STEEL SURFACE TREATMENT: ZINC OVERALL