3/8" Yellow Zinc Finish High Alloy Medium Split Lock Washer / HOLE DIAMETER: 0.377 INCHES MINIMUM AND 0.385 INCHES MAXIMUM OUTSIDE DIAMETER: 0.680 INCHES NOMINAL MATERIAL THICKNESS: 0.094 INCHES MINIMUM END ITEM IDENTIFICATION: TOW TRACTOR AIRCRAFT ENGINE ASSEMBLY NHA; TOW TRACTOR, A/C (P/N 4JPAV, PCC 6J9); MRAP - M-ATV WITH CS13 POP PART NAME ASSIGNED BY CONTROLLING AGENCY: WASHER, LOCK MATERIAL: STEEL OVERALL MATERIAL DOCUMENT AND CLASSIFICATION: SAE J404 4037 ASSN STD SINGLE MATERIAL RESPONSE OVERALL SURFACE TREATMENT: ZINC OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B695 ASSN STD SINGLE TREATMENT RESPONSE OVERALL STYLE DESIGNATOR: 108 SPLIT HELICAL-RIGHT HAND