The globally recognized HLS Hardlock Set Screw

The Hardlock Set Screw is a revolutionary self-locking set screw (hex socket head set screw) which employs the wedge principle to deliver a superior self-locking effect like other Hardlock products without the need to change the conditions of the target application.

hardlock set screws

Powerful self-locking effect
Just like the HLN Hardlock Nut, no matter the conditions the self-locking effect remains secure.

Made of all metal with little few wear surfaces, sustains a powerful self-locking effect.

Easy and efficient
Can be easily installed with just one commercially available tool.

There are no washers or other self-locking components, and no additional processing is required. Switching to the HLB has the benefit of significant total cost reduction.

Self-locking design

self-locking design 02The convex set screw (2) is designed with an eccentric boss that fits with the circular set screw (1) to lock together using the wedge principle in the direction traverse to the shaft.

self-locking design 01

The HLS has the same powerful self-locking effect as the HLN Hardlock Nut. Employing the wedge principle, the HLS is ideal for preventing loosening due to severe vibration and impact load, and can be reused without reduction in performance.
The HLB Hardlock Bearing Nut demonstrates a high self-locking effect regardless of whether the concave or convex nut is tightened first since there is no effect on the perpendicular accuracy.