Ordinary bolts, we generally refer to the bolts require […]
Ordinary bolts, we generally refer to the bolts required for low strength grades, generally 4.8 grades of ordinary bolts. The bolts with low hardness are not very high. Generally, ordinary bolt materials are produced by ordinary screw wires. The hardness, tensile force and torque of ordinary bolt materials are not high and will not be very high.
High-strength bolts generally refer to high-strength bolts. Their screw materials, bolt materials, and bolt materials are relatively good, and the hardness is relatively high. After being manufactured, the bolts are hardened. The bolts are required to reach the grade strength requirements of high strength bolts.