This range of thru-hardened steel washers is engineered for high-strength bolted connections where safety, reliability and long-term performance are critical. Manufactured from quality hardened steel, each washer delivers excellent load distribution, minimises embedding and reduces the risk of bolt loosening under dynamic or static loads.

Designed to work with structural bolts, HSFG assemblies and other high-performance fasteners, these hardened washers provide a secure and stable bearing surface in demanding environments. Their robust construction withstands extreme pressures and vibration, making them ideal for steel fabrication, bridges, infrastructure projects, plant installations, mechanical assemblies and heavy engineering applications.

To ensure durability in aggressive environments, the washers are available with a choice of protective surface treatments, including zinc-plated, sherardized, self-colour and galvanised finishes. These coatings enhance resistance to wear and corrosion, supporting longer service life and reduced maintenance on site.

Manufactured in accordance with key international standards such as DIN 6916, EN14399-6, ISO 7090, BS4395-1 and high hardness classes such as 300HV, the range offers reliable compatibility with structural fasteners and consistent performance across multiple applications. Precision machining and strict quality control give a clean seating face, accurate dimensions and repeatable tightening characteristics, supporting correct preload in friction grip and slip-resistant joints.

Whether used in new-build construction, retrofit works or general industrial fabrication, these thru-hardened washers provide a dependable solution for strengthening bolted joints, improving clamping efficiency and enhancing the overall integrity of assemblies. Professionals choose this type of washer where compliant, high-strength and corrosion-resistant fastening hardware is essential.