Company Commitment

 Hard Lock receives high praise from the Japanese government for our high quality...

 Hard Lock is proud to be a sponsor of the Japanese Olympics bobsleigh team, providing special-made titanium Hard Lock Nuts...

 A world-class inspection device was installed in October 2008 to inspect every product. Hard Lock is working to bring its defects to zero...

 Many of our bills and packaging labels have changed to indicate strength classification instead of the materials used...

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Partnerships with Academia

 Applied technological research with the Hiroshima University Graduate School of Engineering and Science.
Topic: Stress analysis using field emission microscopy and experimentation

 Basic technological research with the Shonan Institute of Technology
Topic: Experiments and analysis of general basic fastener technology

 Design research with the Osaka University of Arts
Topic: Product design for Hard Lock products

News from overseas

Polish rail car manufacturer PESA has selected Hard Lock fasteners for use in their ATR220 cars, which will be put into use in Italy. Click here for the letter of confirmation.

The national China Academy of Material Science has graded Hard Lock as having top-level quality in the world for screw tightness, based on results from Junker screw looseness testing. Click here for the evaluation sheets.

On May 1, 2008, Lee-O Trading Company officially changed its name to Korea Hardlock Ind., greatly expanding our access to the Korean market.

French company ETESIA evaluated Hard Lock with a perfect score in the three areas of delivery, quality and price. Click here to see ETESIA’s certificate of performance.

Hard Lock Industry Product Information

Hard Lock Bearing Nut

Hard Lock Bearing Nut

The HLB (Hard Lock Bearing Nut) consists of a lower convex nut and an upper concave nut. When these two nuts are forced together as the screw is tightened, a powerful bonding action occurs naturally between them, resulting in an excellent self-locking effect. ...

Research Thesis

The Research Thesis which proved the predominancy of a product.
More information.