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Contact SupplierWe are offering thread bar anchor bolt.thread bar bolt is composed of screw thread steel bar , high strength plate ,casting damping nut ,yield tube, washer , and other accessories . According to the structure of steel bar ,the bolt has two stypes : rib rebar bolt and non-rib rebar bolt .
the bolt is usually used in thick coal seam ,that has high stress, large deformation, difficult to support and other poor environment .
feature :
(1) the bolts have high strength stress ,good support capacity can prevent the roof from sinking down ,and the strata sliding .
(2) fast and easy installation by mechanized tools.
(3) be used with resin anchoring cartridge for permanent support .
(4) be used in high stressed ,large deformed area .
(5) low price, widely used in coal mines, railways, hydropower and other types of roadway projects.
(6)thread profile has higher strength than rod and offers excellent mixing capabilities in resins installation