Assortment of 250 M3 black alloy steel hexagon socket screws with hex nuts (truss head)

【Advantages】The cylindrical head allows screwing where space for wrenches is insufficient.【Wide application】These hexagon socket nuts can be used for home and office equipment, communication equipment, ship assembly and other mechanical industries.【High quality】Made of grade 12.9 alloy steel with anti-oxidation treatment, it has good resistance to elongation and corrosion in many environments. 【Used in recessed mounting】It is used in confined spaces where the head must be flush or below the floor. Specifications: Material: Alloy steel A: Cylindrical head B: Domed head C: Flat head Dimensions and quantity: Screws: M3 x 6 mm, 25 pieces M3 x 8 mm, 25 pieces M3 x 10 mm, 25 pieces M3 x 12 mm, 25 piecesM3 x 16 mm, 25 piecesM3 x 20 mm, 25 piecesM3 nuts, 100 pieces