5/8" Martensitic Stainless Steel Internal Tooth Lock Washer / HOLE DIAMETER: 0.640 INCHES MINIMUM AND 0.663 INCHES MAXIMUM OUTSIDE DIAMETER: 1.045 INCHES MINIMUM AND 1.071 INCHES MAXIMUM MATERIAL THICKNESS: 0.042 INCHES MINIMUM AND 0.050 INCHES MAXIMUM END ITEM IDENTIFICATION: 01-622-0440; MRAP M-ATV MATERIAL: STEEL CORROSION RESISTING OVERALL SURFACE TREATMENT: PASSIVATE OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM A380 INTERNATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL STYLE DESIGNATOR: 101 FLAT INTERNAL TEETH