How does the anti-loosening nut get stuck?

Jun 25, 2026 Leave a message

Tom Smith
Tom Smith
Tom is a senior production engineer at Handan Jihao Fastener Co., Ltd. With over 15 years of experience in the fastener industry, he is responsible for overseeing the production lines of cold heading, heat treatment, and surface treatment. His expertise ensures the high - quality manufacturing of fasteners according to international standards.

How can the anti-loosening nutget stuck?The anti-loosening nut mainly prevents loosening by increasing friction, mechanical locking or changing the thread structure. There are several common ways to prevent loosening.

 

Use the internal structure of the nut to generate continuous pressure to increase the friction between the threads.

Nylon self-locking nut: embedded nylon ring. When tightening, the nylon will produce friction with the thread squeeze, but it is usually not resistant to high temperatures.info-800-800

Use the internal structure of the nut to generate continuous pressure to increase the friction between the threads.

Metal self-locking nut: fixed by elastic clamping of metal locking plate or pressing teeth into the preset hole

 

Physical locking can be achieved by changing the thread shape or matching method.

30° wedge-shaped thread: For example, the base of the tooth has a 30-degree slope. When tightening, the normal pressure increases, and the anti-loosening friction force can reach 3 times that of ordinary threads.

Convex nuts: such as HARDLOCK nuts, which are composed of convex nuts and concave nuts, use the wedge principle to integrate bolts and nuts.

Combination locking: used with other parts.

Double nut: the two nuts are tightened to the top, generating interaction pressure to prevent rotation.

Flange nut: the gasket and the nut are integrated, and there is a non-slip tooth pattern at the bottom to increase the contact area.

Permanent locking: make the thread vice non-removable through spot welding, punching or glue coating, which is suitable for occasions that do not need maintenance.

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