S-98040A111 25 mm ID x 43 mm OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel coating, extending service life in harsh industrial environments
• Exceptional hardness rating of Rockwell 15N80 ensures dimensional stability and prevents deformation under heavy loads
• Precise dimensional fit with 25mm ID and 43mm OD designed specifically for M24 screws, providing optimal load distribution
• Robust 6.0-6.9mm thickness delivers enhanced bearing surface strength for heavy-duty applications
• Full regulatory compliance with RoHS 3 and REACH standards, ensuring safe use in regulated industries
• Metric system compatibility for seamless integration with international machinery and equipment standards
• Reliable performance in high-stress applications due to consistent material properties and manufacturing quality

Professional Applications & Engineering Value

This M24 metric flat washer delivers critical engineering value through its black-oxide steel construction and precise dimensional specifications. The 25mm internal diameter provides perfect alignment with M24 fasteners, eliminating misalignment issues in heavy machinery assembly, construction equipment, and industrial manufacturing applications. The black-oxide surface treatment creates a protective barrier against moisture and chemicals, significantly reducing corrosion-related failures in demanding environments. With its Rockwell 15N80 hardness rating, this washer maintains structural integrity under extreme pressure, preventing surface indentation and ensuring consistent load distribution across mating surfaces. These characteristics make it ideal for industrial fastening systems requiring reliable performance in automotive, infrastructure, and manufacturing sectors where vibration resistance and long-term durability are paramount.

Specification Summary & Compliance

This flat washer features precise metric dimensions with 25mm internal diameter, 43mm outer diameter, and 6.0-6.9mm thickness range, engineered for M24 screw applications. Manufactured from black-oxide steel with Rockwell 15N80 hardness certification, it meets industrial standards for dimensional accuracy and material performance. The product is fully RoHS 3 (2015/863/EU) compliant with exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) compliant as of January 17, 2023, containing no SVHCs above threshold limits, ensuring regulatory adherence for global industrial applications.