What is the matching principle between corrugated plugs and nuts?

Jiaxing Xinhan Technology Co., Ltd. is a Chinese manufacturer specializing in the production of various fasteners, mainly producing machine screws, corrugated bolts with nuts, etc. So what are the matching principles of corrugated bolts and nuts?

The matching of bolts and nuts is the key to ensuring the reliability and safety of the connection. Here are the main matching principles:

1. Level matching

Basic principle: The grade of the nut should not be lower than that of the bolt, otherwise it may affect the reliability of the connection.

High-strength matching: High-strength bolts usually need to be paired with high-strength nuts to meet the stability requirements of engineering structures.

Performance grade: For example, an 8th-grade nut can match with an 8.8th-grade bolt, a 10th-grade nut can match with a 10.9th-grade bolt, and a 12th-grade nut can match with a 12.9th-grade bolt.

2. Material consistency

Same material: A bolt and nut combination made of the same material can reduce corrosion and wear, and improve the durability of the connection.

‌Special environment‌: In corrosive environments (such as the ocean), bolts and nuts that meet the corrosion resistance grade should be selected.

3. Force and Strength

Carrying capacity: The matching of bolts and nuts needs to consider the carrying capacity to ensure that the two can work together when under force.

Load-bearing capacity: The load-bearing capacity of nuts is usually higher than that of bolts, which means bolts are more likely to be damaged first in the actual tightening process.

4. Special working conditions.

High-temperature environment: It is necessary to choose bolts and nuts with good heat resistance.

Frequently vibrating occasions: You should choose bolts and nuts of higher grade to prevent loosening.

Sealing requirements: For connections that require sealing, the grade of bolts and nuts must meet the needs of sealing pressure.

5. Manufacturing process and precision

Size accuracy: The standard stipulates the size accuracy of different grades of bolts and nuts, which should be strictly followed to ensure a good assembly effect.

High-quality craftsmanship: High-quality manufacturing processes can improve the accuracy and performance of the match.

6. Application Fields

Aerospace: The requirements for matching bolt and nut grades are extremely strict to ensure flight safety.

Automobile manufacturing: Rationally select the grade of bolts and nuts according to the stress situation of different parts.

Building structure: The grade matching of bolts and nuts affects the overall seismic performance.

7. Forms of invalidation.

Failure prevention: When designing, it is necessary to ensure that the failure form is bolt fracture rather than thread disconnection, so as to warn of improper assembly operation.

By following the above principles, you can ensure that the matching of bolts and nuts meets the engineering requirements, and improve the reliability and safety of the connection.