Hakkin 240-Piece Hex Bolt And Nut Set With Storage Case, Stainless Steel Spring ? [10 Sizes in 3/8" 1/4" 5/16", Hex Head Cap Screw Bolts with Nuts, Flat Washers and Spring Washers Meet All Demands] Nice nuts and bolts assortment include: 1/4"-20 x 3/4", 1/4"-20 x 1-1/2", 1/4"-20 x 1", 1/4"-20 x 2", 5/16"-18 x3/4", 5/16"-18 x 1", 5/16"-18 x 1-1/2", 5/16"-18 x 2", 3/8"-16 x 2-1/2" and 3/8"-16 x 1-1/2". ? [Superior Nuts and Bolts, Washers are All Made of High Quality 304 Stainless Steel, More Durable and Firm] Assorted nuts and bolts have superior rust resistance and the excellent of oxidation resistance, which can ensure long time using. ? [240Pcs Bolts Nuts and Washer Assortment Kit with SAE System, More Size, More Quantity] Various size of 3/8" 1/4" 5/16" screws and nuts, flat washers, spring washers total 240pcs. ? [Hakkin Nuts And Bolts Assortment Kit Can Be Widely Used] in all kinds of precision machinery, classified instruments, instruments, electronic products, household appliances, communication products, locks, lamps, lights, toys, etc. ? [The Screw Set Box Separation Design Makes The Bolts and Nuts Orderly and More Convenient to Take and Store] Storage: Bolts and Nuts Fasteners All are Stored In One Storage Bin Box. In case of missing or confusing.