5/8" Zinc Finish Internal Tooth Lock Washer / HOLE DIAMETER: 0.652 INCHES NOMINAL OUTSIDE DIAMETER: 1.058 INCHES NOMINAL MATERIAL THICKNESS: 0.046 INCHES NOMINAL END ITEM IDENTIFICATION: R19TM900GPMFL PART NAME ASSIGNED BY CONTROLLING AGENCY: 5/8, LOCK WASHER, INTERNAL TOOTH, ZINC PLATED MATERIAL: STEEL COMP 403 OVERALL SURFACE TREATMENT: ZINC OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM B633 ASSN STD SINGLE TREATMENT RESPONSE OVERALL STYLE DESIGNATOR: 101 FLAT INTERNAL TEETH