First, the appropriate mechanical anchor bolt: the so-called mechanical anchor bolt is a classification according to the working principle of the anchor bolt. The general mechanical anchor bolt is composed of screw, annular opening, thrust sleeve, gasket nut. Mechanical anchor bolt is widely used in various strength concrete, can be used in subway, tunnel, curtain wall, heavy industry workshop of nuclear power plant, etc. Mechanical anchor bolt has high bearing capacity, fatigue resistance, seismic resistance, safety reliability.

Second, the choice of manufacturers: the manufacturers with complete qualifications, processing plants, business history, many customer cases, rich industry experience, able to supply goods quickly dare to make a firm commitment to quality are good manufacturers.

Third, look at the written product standards samples: there are formal contracts, the size specification of the back bolt, the thickness of the outer hexagon, the tensile shear strength other product indicators are clear accurate, the standard is consistent with the sample. In this way, conflicts will be greatly reduced in the follow-up. Fourth, look at the promise of quality: "if the product quality does meet the standard, unconditional return replacement.". Whether they dare to make rigid commitments is a manifestation of comprehensive strength.