1/4"-20 Grade 316 NE Stainless Steel Nylon Insert Lock Nut / THREAD DIRECTION: RIGHT-HAND LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT END ITEM IDENTIFICATION: 2330-01-537-8217, SEMITRAILER, TANK, 5000 GALLON, FUEL DISPENSING, UNDER/OVER WING AIRCRAFT THREAD QUANTITY PER INCH: 20 NOMINAL THREAD SIZE: 0.250 INCHES PART NAME ASSIGNED BY CONTROLLING AGENCY: 1/4 INCH-20 316 S/S NYLON INSERT LOCK NUT SPECIAL FEATURES: TYPE NE MATERIAL: STEEL COMP 316 NUT