7/16"-14 Grade C Zinc Finish Steel Top Lock Nut / THREAD DIRECTION: RIGHT-HAND LOCKING FEATURE: PREVAILING TORQUE ALL METAL DESIGN END ITEM IDENTIFICATION: MRAP - COUGAR THREAD SERIES: UNF THREAD QUANTITY PER INCH: 14 NOMINAL THREAD SIZE: 0.437 INCHES BEARING SURFACE TYPE: CHAMFERED MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL