Electric board support, where are they sold?
High strength bolts can be divided into two types of torsion shear type and big six angle type. The national standard torsional shear type high-strength bolt is M16, M20, M22, M24 four kinds, non national standard M27, M30 two kinds
Electric wrench is mainly used in the steel structure installation industry, specially installed steel structure high-strength bolt, high strength bolt is used to connect the steel structure contact, usually with bolt group way.
