Left Handed Mining Anchor Bolt

We are offering left handed mining anchor bolt. Raw material of high strength bolt extending rate not less than 15%.yield strength not less than 335 mpa,breaking strength not less than 490 mpa,material is 20 mnsi hot rolled steel. Compressive respectively is 20 tons -50 tons, diameter 18 -diameter 22 rod body straightness tolerance is 2 mmm or less,right-handed strongly rebar type resin anchor rod, 16 straight rod body tolerance is less than 4 mmm.