3/8"-16 Grade 18-8 NE Stainless Steel Nylon Insert Lock Nut / THREAD CLASS: 3B THREAD DIRECTION: RIGHT-HAND NUT HEIGHT: 0.468 INCHES NOMINAL END ITEM IDENTIFICATION: 2320-01-465-2174 WIDTH ACROSS FLATS: 0.564 INCHES NOMINAL THREAD SERIES: UNC THREAD QUANTITY PER INCH: 16 PART NAME ASSIGNED BY CONTROLLING AGENCY: NUT, HEX LIGHT MATERIAL: PLASTIC NYLON LOCKING INSERT MATERIAL: STEEL OVERALL EXCEPT INSERT