Regular Split Lock Washer, Zinc Plated Steel #4 #6 #8 #10 1/4" 5/16" SAE US Inch $4.37 Size #4 Package Quantity 10 System of Measurement Inch Model Split Lock Washer Material Steel, Zinc Plated Brand MonsterBolts Type Lock Washer condition New This listing is for new US / Inch Steel Split Lock Washers with Zinc Plating. These are Cr+3 rated and fully RoHS compliant.Available in the following sizes : #4, #5, #6, #8, #10 (3/16"), 1/4", 5/16"