We have prepared technical materials on screw fastening and loosening in the form of columns, videos, and downloadable resources. This is a site we would like engineers to utilize.
Content Overview 【Loosening of Screws】 Principles/Types/Evaluation/Testing/Countermeasures 【Design and Tightening of Screw Fasteners】 Mechanics/Design of Screw Fasteners/Screw Tightening Methods/Screw Tightening Tools 【About Screws】 Standards/Types and Usage/Materials/Surface Treatment/Strength of Screw Components 【Screw Troubles】 Troubles during Screw Tightening/Troubles after Screw Tightening/Others (Troubles) ↓↓For more details, click here↓↓
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basic information
【Hard Rock Nut Features】 ■ World-recognized anti-loosening effect ■ Torque and axial force management possible ■ Reusable ■ Easy and good workability ■ Contributes to significant cost reduction *For more details, please refer to the PDF document or feel free to contact us.
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For more details, please refer to the PDF document or feel free to contact us.
catalog（2）
Download All Catalogs![Lock Parts "HLS [Hard Lock Set Screw] (R) Catalog"](https://image.www.ipros.com/public/catalog/image/01/543/445119/IPROS79111561619361849476.jpeg?w=120&h=170)
Company information
Hard Rock Industries is a company that develops, produces, and sells "lock nuts," and it was established in 1974. Our Hard Rock Nuts were created from the strong desire of our founder and technical president, Katsuhiko Wakabayashi, to eliminate accidents caused by loosening screws and to create a safe and secure society. We are still advancing the development and improvement of new anti-loosening products. Our products are used in critical safety locations and areas where maintenance and inspection are difficult. <Main Clients> Railway market (vehicles, tracks, overhead lines, etc.), bridges and highways, transmission towers for power lines, construction and civil engineering, plant equipment, industrial machinery, and more.
![[Technical Information] Troubles Caused by Loosening: What is Bolt Failure?](https://image.www.ipros.com/public/product/image/db3/2000560032/IPROS42180665685764068528.png?w=280&h=280)
