3/8" 316 Stainless Steel Medium Split Lock Washer / HOLE DIAMETER: 0.377 INCHES MINIMUM AND 0.385 INCHES MAXIMUM OUTSIDE DIAMETER: 0.680 INCHES MAXIMUM MATERIAL THICKNESS: 0.094 INCHES MINIMUM END ITEM IDENTIFICATION: 3825-01-577-2713 DISTRIBUTOR, WATER, TANK TYPE HARDNESS RATING: 35.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM PART NAME ASSIGNED BY CONTROLLING AGENCY: MEDIUM-SPLIT LOCK WASHER MATERIAL: STEEL CORROSION RESISTING OVERALL SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: ASTM A380, CLEANED OR DESCALED ASSN STD SINGLE TREATMENT RESPONSE OVERALL STYLE DESIGNATOR: 108 SPLIT HELICAL-RIGHT HAND