Size:M4 Color:1040Pcs M4 Hex Socket Screws Silver Material:Stainless Steel 304 Fastener Type:Cap, Bolt, Hex 1.Metric screw assortment includes: 260 x M4 Bolts are in 13 lengths. 260 x M4 Nuts; 260 x M4 Washers; 260 x M4 Lock Washers; 1 x hex key, 1 x transparent screws and nuts organizer. 2.Machine screws bolts are made of 304 Stainless Steel, durable screws assortment have superior rust resistance and the excellent of oxidation resistance, which can ensure long time using 3.Each screw is packed separately in a bag. Storage: Assorted screws all are stored in one storage bin box, easy and convenient for storing and carrying. 4.Nice Screws assortment, durable nuts and bolts. Extraordinary Technology & Professional & Durability. Machine screw assortment kit accord with standardized metric system, the average error is less than 0.01mm. 5.M4 nuts and bolts assortment kit are widely used in all kinds of precision machinery, classified instruments, instruments, electronic products, household appliances, communication products, locks, lamps, lights, toys, etc.