S-90339A037 Easy-Install Slotted Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from black-oxide steel surface treatment, extending service life in harsh industrial environments
• Exceptional mechanical durability with Rockwell 15N80 hardness rating, maintaining structural integrity under heavy loads
• Precision slot dimensions (17/32" width, 7/8" depth) ensuring secure fit and easy installation with 7/16" and 1/2" screws
• Robust thickness specification (0.365-0.385") providing reliable load distribution and vibration resistance
• Comprehensive regulatory compliance with RoHS 3 and REACH standards, meeting global environmental and safety requirements
• Optimized for inch-system applications with 1.875" outer diameter, ensuring compatibility with standard industrial equipment
• Enhanced installation efficiency through slotted design, facilitating quick assembly and maintenance procedures

Professional Applications & Engineering Value

This black-oxide steel slotted washer delivers critical engineering solutions for heavy machinery, construction equipment, and industrial assembly applications where corrosion resistance and mechanical strength are paramount. The Rockwell 15N80 hardness ensures the washer maintains dimensional stability under extreme pressure and vibration, preventing deformation in high-stress environments. The precisely engineered slot dimensions (17/32" width, 7/8" depth) accommodate standard installation tools while providing secure fastening for 7/16" and 1/2" screw sizes. The black-oxide surface treatment creates a protective barrier against moisture and chemical exposure, making these industrial washers ideal for outdoor applications, manufacturing facilities, and maintenance operations requiring reliable, long-lasting fastening solutions.

Specification Summary & Compliance

Manufactured to precise dimensional tolerances with 1.875" outer diameter, 0.365-0.385" thickness range, and standardized slot specifications (17/32" width, 7/8" depth). Engineered for compatibility with 7/16" and 1/2" screw sizes in inch-system applications. Meets Rockwell 15N80 hardness requirements for superior mechanical performance. Fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) regulations (SVHC list as of 01/17/2023), ensuring environmental and safety standards adherence for global industrial use.