S-90339A211 Easy-Install Slotted Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel finish, extending service life in harsh environments
• Precise 5/8" screw compatibility ensures secure fastening and prevents loosening under vibration
• Heavy-duty durability with Rockwell B40 hardness for reliable performance in high-stress applications
• Optimized slot design (21/32" width, 1" depth) allows easy installation and removal with standard tools
• Robust dimensional stability with 1.25" OD and 0.084-0.097" thickness for consistent load distribution
• Compliance assurance meets RoHS 3 and REACH standards for safe use in regulated industries
• Inch-system precision ensures seamless integration with existing imperial measurement assemblies

Professional Applications & Engineering Value

Engineered for demanding industrial environments, this black-oxide steel slotted washer solves critical fastening challenges through its corrosion-resistant coating and Rockwell B40 hardness. The precisely machined slot (21/32" width × 1" depth) enables quick maintenance access while maintaining structural integrity under dynamic loads. Ideal for heavy machinery, construction equipment, and automotive assemblies where vibration resistance and environmental durability are paramount. The 1.25" OD provides optimal surface coverage, preventing embedment and distributing clamp load effectively across joined materials. These precision washers deliver reliable performance in inch-system applications requiring consistent dimensional accuracy and regulatory compliance.

Specification Summary & Compliance

Manufactured to exacting inch-system standards with OD: 1.25", thickness: 0.084-0.097", and slot dimensions: 21/32" width × 1" depth. Compatible with 5/8" screw size applications. Material hardness certified at Rockwell B40. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, including the latest SVHC updates (06/14/2023, 235 substances).