Specifications High-concerned chemical:None Dimensions:M3*16 DIY Supplies:Metalworking Model Number:M3 Material:Carbon Steel Origin: China p{margin-block-start: 0; margin-block-end: 0} Exquisite Materials: M3 nuts and bolts assortment set is made of carbon steel material, which is corrosion-resistant, not easy to rust, not easy to break or bend, high strength, high hardness, and suitable for indoor and outdoor use Screws Set: M3 bolts and nuts set is designed with screws and equipped with a wrench, with tight and clear threads, uniform force, stable performance, and convenient installation and removal Countersunk Head Screws and Nuts Set: Countersunk head screws and flat head screws are designed to provide better fastening, withstand greater loads, and look better and safer after installation. Wide Application: Suitable for precision instruments, mechanical engineering industry, furniture, home, office equipment, construction, automobiles, bicycles, communication equipment, ship assembly and other fields Package Includes: A total of 450 pieces, sizes include: m3 x 6mm/8mm/10mm/12mm/16mm/18mm/20mm, m3 washers, m3 nuts