3/4"-16 Grade C Zinc Finish Steel Top Lock Nut / THREAD DIRECTION: RIGHT-HAND LOCKING FEATURE: LUBRICATION: WAX NUT STYLE: A12 HEXAGON NUT HEIGHT: 0.617 INCHES MINIMUM AND 0.827 INCHES MAXIMUM END ITEM IDENTIFICATION: MRAP - UNIQUE NSN - USED ON 3 MRAP VARIANTS WIDTH ACROSS FLATS: 1.088 INCHES MINIMUM AND 1.127 INCHES MAXIMUM THREAD SERIES: UNF THREAD QUANTITY PER INCH: 16 NOMINAL THREAD SIZE: 0.750 INCHES BEARING SURFACE TYPE: FLAT MATERIAL: STEEL OVERALL SURFACE TREATMENT: ZINC OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTMF1941 ASSN STD ALL TREATMENT RESPONSES OVERALL