Bolts made of high-strength steel or requiring large preload can be called high-strength bolts. High strength bolts are mostly used for the connection of bridges, rails, high-voltage and ultra-high voltage equipment. The fracture of this kind of bolt is brittle fracture.
High strength bolt grade 8.8 external hexagonal screw grade 10.9 bolt screw grade 12.9 full and half button hexagonal screw
High strength bolts applied to ultra-high pressure equipment need to be prestressed to ensure the sealing of the container.
Category high strength
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