S-98035A111 25 mm ID x 40 mm OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel finish, extending service life in harsh industrial environments
• Exceptional surface hardness (Rockwell 15N80) prevents deformation under heavy loads and repeated use
• Precise dimensional fit with 25mm ID specifically engineered for M24 screws, ensuring secure fastening alignment
• Optimized load distribution through 40mm OD design, minimizing surface pressure and material stress
• Rigorous quality compliance with RoHS 3 and REACH regulations, guaranteeing environmental and safety standards
• Versatile thickness range (3.5-4.4mm) accommodates varying assembly requirements while maintaining structural integrity
• Heavy-duty performance in metric sizing, making it ideal for industrial machinery and construction applications

Professional Applications & Engineering Value

This M24 metric flat washer delivers critical engineering solutions through its black-oxide steel construction and precision dimensions. The 25mm internal diameter ensures perfect alignment with M24 fasteners, eliminating misalignment issues in industrial assembly lines. The black oxide surface treatment provides essential corrosion protection where moisture, chemicals, or outdoor exposure would compromise ordinary washers. With its 40mm outer diameter, it effectively distributes clamping force across wider surfaces, preventing component damage in heavy-duty applications like machinery bases, structural steel connections, and automotive assemblies. The combination of Rockwell 15N80 hardness and controlled thickness variation ensures consistent performance under vibration and dynamic loads, making it an indispensable component for engineers requiring reliable metric flat washers that withstand demanding operational conditions.

Specification Summary & Compliance

This flat washer features precise metric dimensions with 25mm ID, 40mm OD, and 3.5-4.4mm thickness range. Manufactured from black-oxide steel with Rockwell 15N80 hardness rating, it meets industrial standards for dimensional accuracy and mechanical properties. The product is fully RoHS 3 (2015/863/EU) compliant under exemption 6(a) for lead as steel alloying element and REACH (EC 1907/2006) compliant with current SVHC requirements, ensuring regulatory adherence for global industrial applications.