Katsuhiko Wakabayashi
president

Hard Lock manufactures and sells nuts that do not loosen as well as other hardware that plays a vital role in building safety despite being tucked in locations invisible to the public eye. Hard Lock is dedicated to their manufacturing concept of the power in safety.

Power in Safety

The anti-loosening Hard Lock Nut HL and Hard Lock Bearing Nut HLB® employ the wedge principle to achieve a powerful locking energy not affected by shock or vibration. Both the Hard Lock Nut and the Hard Lock Bearing Nut are safe, easy to fasten and remove, and generally easy to use. They are also maintenance-free. The popularity of these products in industry has set Hard Lock apart from other hardware manufacturers.

The Hard Lock® Nut �EBorn in Japan, Raised in the World

The Hard Lock Nut got its start when Hard Lock engineers began wondering if they could apply the principle of the wedge to hardware to prevent nuts from loosening. Through trial and error, they perfected this concept into a technology. The internal locking energy is completely unaffected by external shock and vibration, maintaining a completely fastened state.

Hard Lock’s products are used to ensure safety on railroads, expressways and bridges as well as in high-rise buildings, industrial machinery and public facilities.

No other locking nut has the anti-loosening power, ease of use including fastening and removal as Hard Lock’s nuts. Plus, they are maintenance-free. These economic advantages are reflected in the high level of trust and popularity that Hard Lock’s products have gained in industry.

Created in the pursuit of safety, the Hard Lock Nut proves its power by protecting the public in places invisible to the eye.

The Hard Lock Bearing Nut HLB®
The HLB®

Built with the same powerful, anti-loosening construction as the Hard Lock Nut, the HLB or Hard Lock Bearing Nut provides superior fastening power to prevent bearings from loosening and is highly rated in industry. The internal locking energy is completely unaffected by external shock and vibration, maintaining a completely fastened state.

The HLB is used widely in welding, pressing and lathe machinery as well as equipment for construction, transportation, trains and shipbuilding. The HLB is so well trusted, it is also employed for use in robots and aerospace.

The HLB is maintenance-free and has a stronger fastening force and higher efficiency that other general-purpose nuts. The economic value resulting from the lower total cost meets a strong demand and has built strong trust with industry.