REVOLVING NUT DXTB224 M22x1.5xS34xH30-32/M22x1.75xS32xH32

Vibration and alternating loads during continuous operation of trucks are the main causes of fastener loosening. Therefore, the anti loosening design of truck nuts is its core feature:
This is one of the most prominent features. One end of the nut has a wide flange that is forged as a whole. Its advantages are twofold: firstly, it significantly increases the contact area with the surface of the connecting piece, effectively reducing surface pressure and preventing the crushing of softer connecting materials (such as aluminum alloy brackets); Secondly, the bottom surface of the flange is usually cast with continuous or intermittent radial serrations or concentric circular grooves, which can strongly "bite" into the surface of the workpiece, generating huge mechanical resistance and effectively preventing the nut from rotating.
An elastic ring made of engineering nylon (usually PA66) is embedded at the top of the nut. When the bolt is screwed in, the nylon ring is subjected to radial compression, generating huge normal pressure and friction on the bolt thread, forming a strong elastic self-locking. This locking effect is long-lasting and reliable, able to maintain pre tension even under strong vibration, and can be reused multiple times.
By creating ellipticity at the top of the nut or applying radial compression to local threads (such as the Spire point riveting technique), there is minimal interference interference with standard threads. When rotating, the deformed part has a strong tightening effect with the bolt thread, achieving full metal locking, high temperature resistance, and long service life.

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