TECHNICAL DATA

 Hard Lock’s eccentric structure is a mark of quality and safety

     Although the two lock nuts look very similar, the one on the right with the Hard Lock carved seal is the original Hard Lock developed by our company. The Hard Lock nut is a top class patented loosening stopping nut, which is a product of the wedge principle resulting from the nut’s eccentric structure. Having successfully passed all loosening tests, the Hard Lock nut is one of our products we are most proud of. The Hard Lock nut has been trusted for thirty years in various industries and cannot be compared to competitor products when it comes to supporting bullet train related transportation safety. We conducted our own original severe vibration impact tests based on the US NAS3350/3354 standard screw looseness test and a Junker system loosening test machine.

The Hard Lock carved seal is a mark of quality and safety               

As a result, there have been no accidents resulting from the loosening of Hard Lock nuts and the Hard Lock carved seal is a symbol of our quality and safety guarantee. A maintenance free product has immeasurable positive economic effects. Hard Lock is devoted to maintaining its track record of trustworthiness, quality, and safety. Please beware of similar products that are copies of the Hard Lock nut, for the troubles that may arise can lead to large expenses.