1/4"-20 Grade 2 Zinc Finish NTE Steel Jam Nylon Insert Lock Nut / THREAD DIRECTION: RIGHT-HAND LOCKING FEATURE: PREVAILING TORQUE WITH NONMETALLIC INSERT NUT STYLE: A19A INTERNAL OR EXTERNAL WRENCHING HEXAGON END ITEM IDENTIFICATION: 2355015393639 THREAD QUANTITY PER INCH: 20 NOMINAL THREAD SIZE: 20.000 INCHES PART NAME ASSIGNED BY CONTROLLING AGENCY: JAM NYLON INSERT LOCK NUT SPECIAL FEATURES: IMPERIAL;0.250 DIAMETER;COARSE THREAD;CASED METAL OUTSIDE MATERIAL: STEEL NUT SURFACE TREATMENT: ZINC NUT NONDEFINITIVE SPEC/STD DATA: 2 GRADE AND 0.218 THICKNESS AND LOCKNUT TYPE AND 0.0050 POUNDS WEIGHT