3/8"-16 Zinc Finish Case Hardened Serrated Flange Nut / THREAD CLASS: 2B THREAD DIRECTION: RIGHT-HAND OVERALL HEIGHT: 0.330 INCHES MINIMUM AND 0.347 INCHES MAXIMUM WASHER THICKNESS: 0.040 INCHES MINIMUM WIDTH ACROSS FLATS: 0.728 INCHES MINIMUM AND 0.750 INCHES MAXIMUM THREAD SERIES: UNC THREAD QUANTITY PER INCH: 16 NOMINAL THREAD SIZE: 0.375 INCHES PART NAME ASSIGNED BY CONTROLLING AGENCY: SERRATED HEX FLANGE NUT MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL