1/4"-20 Grade 18-8 NE Stainless Steel Nylon Insert Lock Nut / THREAD CLASS: 2B THREAD DIRECTION: RIGHT-HAND NUT STYLE: A8 SINGLE BALL SEAT, HEXAGON NUT HEIGHT: 0.298 INCHES MINIMUM AND 0.328 INCHES MAXIMUM END ITEM IDENTIFICATION: 2320-01-528-6294 TRUCK, TANK WIDTH ACROSS FLATS: 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM THREAD SERIES: UNC THREAD QUANTITY PER INCH: 20 NOMINAL THREAD SIZE: 0.250 INCHES PART NAME ASSIGNED BY CONTROLLING AGENCY: NYLON INSERT LOCK NUT MATERIAL: PLASTIC NYLON LOCKING INSERT MATERIAL: STEEL CORROSION RESISTING OVERALL EXCEPT INSERT SURFACE TREATMENT: PASSIVATE OVERALL EXCEPT INSERT SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM A380 ASSN STD SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT