#4-40 Grade 2 Zinc Finish NM 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: 0.153 INCHES NOMINAL END ITEM IDENTIFICATION: 5895-01-564-7999 WIDTH ACROSS FLATS: 0.250 INCHES NOMINAL THREAD SERIES: UNC THREAD QUANTITY PER INCH: 40 NOMINAL THREAD SIZE: 0.112 INCHES BEARING SURFACE TYPE: FLAT PART NAME ASSIGNED BY CONTROLLING AGENCY: NYLON INSERT LOCK NUT SPECIAL FEATURES: MATERIAL GRADE 2 MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL