5/16-18x1-3/4 Hex Socket Bolts 12.9 Grade Alloy Steel Black Oxide 20 Pack

Description: Material: Made of 12.9 grade alloy steel black oxide finish it has high strength rust resistance oxidation resistance and corrosion resistance which can ensure long-term use. Advantage: Hexagonal socket head type uniform force is not easy to slip easy to use. Suitable for replacing old bolts at any time. Application: Widely used in woodworking and DIY jobs fasteners for the furniture repair industry etc.