Factory 47mm friction rock bolt underground mining bolts 

Product Description Split set bolt, also called split set stabilizer, is an indispensable advanced material for underground mining support. Split set bolt is a very specific support product, and it is an advanced material used for the support of the roof of the underground copper or gold mining and other projects. Product Parameters ITEM No. Diameter Steel thickness Min Yield Strength Min Breaking Strength Elongation   Anchoring Load Domed Plate Size ATFB33 33mm…