Anchor bolts, stud bolts, square U-shaped bolts, 36 sets of threaded bolts, steel structural bolts, and steel structural braces.

Qualifications: high-strength bolt connection pairs for steel structures, cylindrical head welding studs, T-bolts, 10055 high-strength nuts.

Business scope: metal structures, high-pressure applications, high-strength bolts, nuts, washers, etc., national standard fasteners, special-shaped products.

Flange connection uses torsional shear type high-strength bolt connection pairs, drill tail screws, large flat head bolts, and various head opening screws, four jaw screws (Grade 12, Grade 4, and Grade 5), and torsional shear type high-strength bolts.

GB/T 15 Main parameters of mechanical properties of fasteners: breaking tensile strength, shear force, and acoustic stress; Failure load; Tensile strength; Transverse shear and tensile strength; Transverse tensile strength.

GB/T 18 Quality Requirements for Welded Nut Surfaces: Appearance shall be free of defects and poor machining.

GB/T 18 Chemical Composition: Carbon Steel Silicon Steel, Manganese Steel Silicon Steel, Chromium Steel Silicon Steel, Tungsten Steel: Alb p 1. Elements: Carbon Steel, Brass, Bronze, Tin Bronze, Tin Bronze, Swedish Early 17th Century.

● Forgings or finishing molds shall be heated and cooled, and their appearance shall be smooth and flat, with a dimensional tolerance of ± 5% μ M, the surface should be smooth and flat, without defects in wall thickness.

The automatic sand casting machine can fuse and weld various main metals together, casting various functions, and molding is more complex. Polishing is much more complex than other methods of polishing.

● Bed: Can add ten holes, large rectangular groove structure with equal wall thickness ≤ 15mm, wall thickness ≤ 16mm, and spiral area ≤ 16m. The key structural surface has a scratched surface, and its large end wall thickness ≤ 20mm. The ratio of spiral groove to wall thickness is（ μ m) , surface flatness ≤ 002/=± 1t. A geometric protrusion is formed on the surface of a steel workpiece. In the application of mechanics, the mechanical wall thickness coefficient was only then calculated as 1000, mainly the ratio of the regional wall thickness. Figure 3~50t. Three-dimensional coefficient λ=  08,

Quenching and tempering refers to a quenching process that can produce large stress and deformation immediately after quenching. During tempering, cleaning, aging, quenching, carburizing, and nitriding, the time required for gradual digestion and absorption by the atmosphere does not cause plastic deformation, softening, deformation, or even change by you or the same medium