Introduction of high strength bolt

Brief introduction of high strength bolt products:
High strength bolts in China are divided into 6.8 grade bolts, 8.8 grade bolts, 10.9 grade bolts and 12.9 grade bolts. Steel structure bolt manufacturer steel structure bolt is a kind of high strength bolt, which is also a kind of standard parts. Good fastening performance, used in steel structure, engineering, so that the tightening effect. General steel structure, the requirements of steel structure bolts are 8.8 grade or above, there are 10.9 grade, 12.9 grade, all of them are high strength steel structure bolts, sometimes the bolts on steel structure do not need electroplating, use the natural color is OK. High strength bolts are made of high strength steel or need to be applied with large pre tightening force.
Standard for high strength bolts:
The national standard of high strength bolt is divided into: GB 5782 half thread high strength bolt, GB 5783 full thread high strength bolt, GB 5784 thin rod high strength bolt, GB 5785 fine tooth high strength bolt, GB 5786 fine tooth full thread high strength bolt and GB 1228 large hexagon head high strength steel structure bolt.

Material of high strength bolt:
35K bolt, bolt 45 steel, 40Cr steel bolt, bolt 42cr, bolt 35CrMoA.
Application of high strength bolt:
High strength bolts are mainly used to connect steel structure plate in steel structure engineering.
1. One of the most important features of high strength bolts is the limitation of single use. It is usually used for permanent connections. Do not reuse.
2。 Classification of high strength bolts:
3. According to the stress state, it can be divided into friction type and pressure type;
4. According to the construction process, the high strength bolt and large hexagon high strength bolt are divided into two parts.
5. Large hexagon high-strength bolt is a high-strength ordinary screw, torsion shear and large hexagon increase, in order to better construction type high-strength bolt.
6. The construction of high strength bolts must be completed first. The first tightening of high strength bolts requires the use of impact type electric wrench or adjustable torque electric wrench. There are strict requirements for end fastening high-strength bolts, and torsion type high-strength bolts must use torsion type electric wrench. The end tightening torque type high strength bolt must be a torque type electric wrench.
7. The large hexagon strength bolt is composed of bolt, nut and two washers.
The company's main business: high strength bolt, high strength nut, steel structure bolt, steel structure nut, grid sealing plate, grid bolt, etc.