S-90377A163 0.266" ID x 3" OD Oversized Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from Black-Oxide 18-8 Stainless Steel construction, ideal for harsh industrial environments
• Superior load distribution with large 3" outer diameter, minimizing surface pressure and preventing material damage
• Precise compatibility with 1/4" fasteners through 0.266" inner diameter, ensuring secure fit and vibration resistance
• Durable mechanical performance from 0.050-0.080" thickness range, providing reliable spacing and structural support
• Environmental compliance assurance meeting RoHS 3 and REACH standards for safe industrial usage
• Long-term reliability with stainless steel's inherent strength against degradation and oxidation
• Versatile inch system compatibility for seamless integration with existing industrial equipment and assemblies

Professional Applications & Engineering Value

This heavy-duty flat washer delivers critical engineering solutions where corrosion resistance and load distribution are paramount. The Black-Oxide 18-8 Stainless Steel construction provides superior protection against chemical exposure and atmospheric corrosion in marine, chemical processing, and outdoor industrial applications. The substantial 3" outer diameter effectively distributes clamping force across wider surfaces, preventing joint loosening from vibration and reducing stress concentration on soft materials. With precise 0.266" inner diameter matching standard 1/4" fasteners, this flat washer ensures secure assembly integrity in structural frameworks, machinery bases, and heavy equipment where reliability cannot be compromised.

Specification Summary & Compliance

Manufactured to inch system standards with inner diameter of 0.266" specifically designed for 1/4" screw applications. Features outer diameter of 3" with thickness ranging 0.050-0.080" for consistent performance. Constructed from 18-8 Stainless Steel with Black-Oxide surface treatment for enhanced durability. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring adherence to industrial safety and substance restriction requirements.