S-90339A206 Easy-Install Slotted Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel coating, extending service life in humid or harsh industrial environments
• Precise slot dimensions (9/32" width, 5/8" depth) ensure easy alignment and secure fastening with 1/4" screws
• Enhanced load distribution from the 1" outer diameter, reducing surface pressure and preventing material damage
• Consistent mechanical performance with Rockwell B40 hardness, maintaining shape under vibration and stress
• Full regulatory compliance with RoHS 3 and REACH standards, ensuring safe use in global markets
• Optimized thickness range (0.056-0.071") provides reliable spacing and tension control in assembly applications
• Durable inch-system design for seamless integration with standard industrial equipment and replacement parts

Professional Applications & Engineering Value

This slotted washer in black-oxide steel addresses critical challenges in mechanical assemblies where corrosion resistance and precise fit are paramount. The 1" OD and controlled slot dimensions (9/32" width, 5/8" depth) enable quick installation and stable positioning for 1/4" screw applications, minimizing loosening in high-vibration settings like machinery, automotive frames, and structural supports. The Rockwell B40 hardness ensures the washer withstands repeated loads without deformation, while the black-oxide finish provides a protective barrier against rust and wear. Ideal for industrial washers needs in manufacturing, construction, and maintenance, this component enhances assembly reliability and reduces downtime.

Specification Summary & Compliance

This washer meets standard inch system tolerances with an outer diameter of 1", thickness range of 0.056-0.071", and slot specifications of 9/32" width and 5/8" depth, tailored for 1/4" screw size compatibility. It conforms to industry manufacturing practices for slotted washers and is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to environmental and safety standards.