S-90339A205 Easy-Install Slotted Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance from black-oxide steel coating, extending service life in harsh industrial environments
• Precise slot alignment with 9/32" width and 1/2" depth for secure positioning with 1/4" fasteners
• Superior mechanical strength with Rockwell B40 hardness rating for reliable load distribution
• Optimized dimensional stability with 0.75" OD and 0.056-0.071" thickness for consistent performance
• Compliance assurance meeting RoHS 3 and REACH standards for global industrial applications
• Reduced maintenance requirements through durable surface treatment and material integrity
• Interchangeable compatibility with inch-system components for simplified assembly processes

Professional Applications & Engineering Value

This black-oxide steel slotted washer delivers critical engineering solutions for industrial assembly challenges. The corrosion-resistant coating prevents degradation in moisture-prone environments, while the Rockwell B40 hardness maintains structural integrity under vibration and load stresses. Precision-engineered with 9/32" slot width and 1/2" slot depth, it ensures perfect alignment with 1/4" screws in machinery, automotive, and construction applications. The 0.75" OD provides optimal bearing surface distribution, preventing fastener loosening and material deformation. These industrial washers serve as reliable components in electrical enclosures, production equipment, and outdoor structures where corrosion resistance and dimensional accuracy are paramount.

Specification Summary & Compliance

Manufactured to inch system standards with 0.75" outer diameter and thickness range of 0.056-0.071". Features 9/32" slot width and 1/2" slot depth compatible with 1/4" screws. Material hardness certified to Rockwell B40 specifications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and industrial suitability.