Hex Bolts And Nuts And Washers Assortment Kit, 496 Pcs Metric Hex Head, M4 M5 M6 What are the advantages of our hex bolt nut? Superb 304 Stainless Steel Material: Our hex head nuts and bolts and washers kits are made of high-quality 304 stainless steel, which has superior rust resistance, wear resistance, oxidation resistance, corrosion resistance, no deformation, high hardness and durability. Hex Bolts and Nuts and Washers Kit: The external hexagonal design makes the preloading contact area large, which can use a large preloading force, which is convenient for installation and disassembly in a small space. The bolts and nuts kit has a compact structure, is not easy to loosen, and has a relatively high load-bearing capacity. Equipped with Hex Nut and Two Kinds of Washers: The hex nut can make your installation more precise, fasten better and carry more load; flat washer can increase contact area, provide strong holding force and maximum clamping force; spring washer Used to provide tension and preload in joint assemblies. Wide Range of Uses: Suitable for various mechanical equipment, classified instruments, meters, household appliances, electronic products, communication products, locks, lamps, maintenance industries, etc. Ideal for professionals, maintenance personnel, carpenters, landlords, handymen, repairmen and more. Package Includes: 496 pcs in total, size includes: m4*12 mm, m4*16 mm, m4*20 mm, m4*30 mm, m5*16 mm, m5*20 mm, m5*25 mm, m5*30 mm , m6*16 mm, m6*20 mm, m6*30 mm, m6*40 mm, including corresponding nuts and two kinds of washers, the quantity is sufficient and the size is rich, meeting the needs of daily use.