3M Screw Material: 12.9 grade alloy steel material, which is non-greasy, oxidation-resistant, corrosion-resistant and not easy to deform, suitable for long-term storage and long-term use.
Screws Assortment Kit: Total 280 pcs M3 x 4/5/6/8/10/12/16/20/25mm Black Hexagon socket cheese head screws with lock nut and lock washer in various sizes and in sufficient quantities to meet your different daily needs.
M3 Screw Kit: Screws and nuts are well packed in 10 compartments and assorted in a transparent plastic box for convenient use and storage.
Functions of Small Screws: 3M screws is ideal for use in confined areas as fixing component, industrial and construction fasteners.
Widely Used in: fasteners for household and office equipment, communication equipment, ship assembly or machinery industry.