Newlng Nuts And Bolts M3 M4 M5 M6 Nuts Kit 304 Stainless Steel Hex Socket Head ??Nuts and Bolts Set Size? Our hexagon socket screws and nuts: M3X10, M3X20, M3X25, M3X30, M4X10, M4X20, M4X25, M4X30, M5X10, M5X20, M5X25, M5X30, M6X10, M6X20, M6X30, M6X40 , each size 40pcs . A total of 320pcs, 16 kind of models. One purchase can meet your multiple needs. Both M3 M4 M5 M6 bolts and nuts will be placed in a transparent plastic box with matching labels, easy to use and install. ???Hexagon socket head cap screws material?: The screw set is made of high quality 304 stainless steel, which has high strength and good corrosion resistance in harsh environments such as high temperature, cold and high humidity. bolts and nuts set have excellent rust resistance and excellent oxidation resistance to ensure long-term use. ???Complete Hex Bolt Set?Our thread bolt sets come with a full set of bolts and hex nuts, lock rings and washers for more precise installation and increased contact area to reduce stress and protect parts and bolts. You can use it appropriately according to actual needs. It will be a good helper for your repair. ???Screw and Nut Set Application?: Stainless steel screw assortment box Widely used in 3D printer components, home decoration, furniture installation, bicycles and motorcycles, industrial machinery, automobiles, construction, smart device repair ??Convenient Packing?All cylinder head bolts, nuts and washers are put in a durable and sturdy box for storage to avoid loss. By looking at the sticker on the surface of the box, you can quickly find the type of bolt, nut or washer you need.