S-90339A208 Easy-Install Slotted Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from black-oxide steel finish, extending service life in demanding industrial environments
• Precise 1" outer diameter ensures optimal load distribution and prevents fastener pull-through
• Optimized slot dimensions (17/32" width, 3/4" depth) provide secure engagement with 1/2" screws
• Enhanced mechanical strength with Rockwell B40 hardness rating for reliable performance under stress
• Environmental compliance assurance with RoHS 3 and REACH standards for safe global sourcing
• Consistent thickness tolerance (0.056-0.071") maintains uniform clamping force in assembly applications
• Heavy-duty construction delivers exceptional durability for mechanical and structural applications

Professional Applications & Engineering Value

This black-oxide steel slotted washer addresses critical engineering challenges in industrial assembly where corrosion resistance and mechanical reliability are paramount. The 1" OD slotted washer design provides superior load distribution for 1/2" screw applications, preventing surface damage and maintaining joint integrity in heavy machinery, structural frameworks, and automotive assemblies. The black-oxide surface treatment creates a protective barrier against oxidation and environmental degradation, while the precise slot dimensions ensure secure positioning during vibration-intensive operations. Engineered for industrial washers applications requiring both Rockwell B40 hardness and regulatory compliance, this component delivers consistent performance in corrosive environments while meeting international environmental standards.

Specification Summary & Compliance

This slotted washer features inch system dimensions with 1" outer diameter, 0.056-0.071" thickness range, and precision slot dimensions of 17/32" width and 3/4" depth. Manufactured from black-oxide steel with Rockwell B40 hardness rating, the washer complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and unrestricted use in global industrial markets. The component is engineered for compatibility with 1/2" screw applications requiring reliable mechanical performance and corrosion resistance.