S-90377A131 0.266" ID x 0.875" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel with black-oxide finish, ideal for harsh industrial environments
• Precise dimensional fit with 0.266" ID specifically engineered for 1/4" screws, ensuring secure fastening
• Exceptional load distribution through 0.875" OD design, preventing surface damage and joint failure
• Consistent mechanical performance with Rockwell B68 hardness, maintaining structural integrity under stress
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial applications
• Durable thickness tolerance (0.050-0.080") providing reliable spacing and vibration resistance
• Long-term cost efficiency through stainless steel construction, reducing replacement frequency

Professional Applications & Engineering Value

These black-oxide 18-8 stainless steel flat washers deliver critical engineering solutions where corrosion resistance and mechanical reliability are paramount. The 0.875" OD provides optimal surface coverage while the 0.266" ID ensures precise alignment with 1/4" screws, preventing galvanic corrosion in mixed-material assemblies. The Rockwell B68 hardness maintains dimensional stability under heavy clamping forces, making these inch-system washers ideal for industrial machinery, marine equipment, and outdoor structures exposed to moisture and chemicals. The black-oxide surface treatment enhances both corrosion protection and aesthetic integration in finished products.

Specification Summary & Compliance

Manufactured to standard inch system dimensions with 0.875" outer diameter, 0.266" inner diameter, and 0.050-0.080" thickness range. Constructed from 18-8 stainless steel with Rockwell B68 hardness rating. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and chemical restriction adherence for industrial distribution.