Tightlok Threadbar Bolt is composed of screw thread steel bar , high strength plate , damping nut ,yield tube, washer , and other accessories.

Usually used in thick coal seams with very high stress and large deformation.

Feature :

(1) High strength stress and good support capacity which can prevent the roof from sinking and sliding.

(2) Fast and easy installation by mechanized tools.

(3) Used together with resin cartridge for permanent support.a

(4) Left hand thread direction

(5) Specially “Sandwich”device can buffer and release the pressure of the rocks.