S-90377A123 0.203" ID x 0.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh environments
• Exceptional durability and deformation resistance due to Rockwell B68 hardness rating
• Precise dimensional fit with 0.203" ID and 0.5" OD for reliable No. 10 screw applications
• Consistent load distribution with uniform 0.030-0.050" thickness for enhanced joint stability
• Regulatory compliance assurance meeting RoHS 3 and REACH environmental standards
• Extended service life through oxidation-resistant surface treatment and material integrity
• Versatile industrial compatibility with inch-system fastening requirements

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these Black-Oxide 18-8 Stainless Steel flat washers deliver critical protection against galvanic corrosion and chemical exposure while maintaining dimensional stability under load. The precision inch dimensions (0.203" ID × 0.5" OD) ensure perfect alignment with No. 10 screw applications, preventing loosening from vibration and thermal cycling. The Rockwell B68 hardness provides superior resistance to embedding and surface deformation, making these corrosion-resistant washers ideal for electrical enclosures, marine hardware, food processing equipment, and outdoor infrastructure where environmental compliance and long-term reliability are paramount.

Specification Summary & Compliance

This flat washer features inch-system dimensions with 0.203" internal diameter, 0.5" outer diameter, and 0.030-0.050" thickness range. Manufactured from 18-8 Stainless Steel with Black-Oxide surface treatment and Rockwell B68 hardness specification. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.