Washer Assortment Dimensional Standards ASME B18.22.1 Finish Zinc Plated Includes (30) FTWS-0250-ZN (30) FTWS-0312-ZN (30) FTWS-0375-ZN (30) FTWS-0500-ZN (30) SLW-0250-ZC/B (30) SLW-0312-ZC/B (30) SLW-0375-ZC/B (30) SLW-0500-ZC/B (5) FTWS-0750-ZN (5) SLW-0750-ZC/B (6) SLW-0625-ZC/B (6)FTWS-0625-ZN Material Steel Number of Sizes Included 12 Number of Washers Included 232 System of Measurement Inch Washer Type Flat Split Lock