Product Introduction of High Strength Bolts

Product Introduction of High Strength Bolts

Introduction to 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 high-strength bolt and also a standard component. The fastening performance is relatively good, used in steel structures and engineering, to enhance the fastening effect. On general steel structures, the required steel structural bolts are grade 8.8 or above, as well as grade 10.9 and 12.9, all of which are high-strength steel structural bolts. Sometimes, the bolts on steel structures do not need to be electroplated, and it is OK to use the natural color. High strength bolts made of high-strength steel or requiring significant pre tightening force can be referred to as high-strength bolts.

Standard for high-strength bolts:

The national standards for high-strength bolts are divided into: GB 5782 half thread high-strength bolts, GB 5783 full thread high-strength bolts, GB 5784 thin rod high-strength bolts, GB 5785 fine tooth high-strength bolts, GB 5786 fine tooth full thread high-strength bolts, and GB 1228 large hexagonal head high-strength steel structural bolts.

Material of high-strength bolts:

35K bolt, bolt 45 # steel, 40Cr steel bolt, bolt 42cr, bolt 35CrMoA.

The purpose of high-strength bolts:

High strength bolts are mainly used to connect steel structural plates in steel structural engineering.

One of the most important features of high-strength bolts is the limitation of single use. It is usually used for permanent connections. Reuse is prohibited.

2. Classification of high-strength bolts:

III. According to the stress state, it can be divided into friction type and pressure type;

4. According to the construction process, high-strength bolts and large hexagonal high-strength bolts are divided into two parts.

5. The large hexagonal high-strength bolt is a high-strength grade ordinary screw, with improved torsion and shear compared to the large hexagonal bolt, in order to better construct high-strength bolts.

6. The construction of high-strength bolts must be completed first. The first tightening of high-strength bolts requires the use of an impact electric wrench or an adjustable torque electric wrench. There are strict requirements for tightening high-strength bolts at the end, and torsion type electric wrenches must be used for end tightening and torsion type high-strength bolts. The end tightening torque type high-strength bolts must be torque type electric wrenches.

7. The large hexagonal high-strength bolt consists of a bolt, a nut, and two washers.