S-90339A032 Easy-Install Slotted Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide steel finish, extending service life in demanding environments
• Superior surface hardness rated at Rockwell 15N80 to resist wear and maintain dimensional stability under load
• Precision slot dimensions (9/32" width, 5/8" depth) ensuring secure tool engagement and efficient installation
• Versatile compatibility with No. 10, No. 12, No. 14, and 1/4" screw sizes for flexible assembly applications
• Robust construction with 1" OD and 0.240-0.260" thickness for reliable load distribution and vibration resistance
• Regulatory compliance with RoHS 3 and REACH standards, meeting international environmental and safety requirements
• Optimized for inch-system applications in industrial machinery, automotive, and construction assemblies

Professional Applications & Engineering Value

Engineered for heavy-duty industrial applications, these black-oxide steel slotted washers address critical challenges in mechanical assemblies where vibration loosening and corrosion are common failures. The Rockwell 15N80 hardness ensures the washer maintains its form under high clamping forces, while the precise slot dimensions allow for easy adjustment with standard tools. Ideal for use in automotive subassemblies, machinery frames, and construction equipment, these inch-system washers provide consistent performance in environments exposed to moisture, chemicals, and dynamic loads. Their RoHS and REACH compliance makes them suitable for global supply chains, ensuring safety and durability in high-stress applications without compromising regulatory standards.

Specification Summary & Compliance

This slotted washer features a 1" outer diameter with thickness ranging from 0.240" to 0.260", manufactured to standard inch-system tolerances. The black-oxide steel construction meets industry specifications for corrosion protection and mechanical strength. It is compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) as of January 17, 2023, covering 233 Substances of Very High Concern, ensuring adherence to environmental and health regulations.