S-90377A166 0.344" ID x 2" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for harsh industrial environments
• Precise dimensional fit with 0.344" ID and 2" OD, ensuring proper alignment and load distribution for 5/16" fasteners
• Enhanced durability from 18-8 stainless steel material, providing long-term reliability in demanding applications
• Consistent performance with 0.050-0.080" thickness range, maintaining uniform pressure distribution
• Environmental compliance with RoHS 3 and REACH standards, meeting strict industrial safety requirements
• Reliable surface protection through black-oxide finish, reducing galling and improving chemical resistance
• Versatile inch system compatibility for seamless integration with existing industrial equipment and fasteners

Professional Applications & Engineering Value

This Black-Oxide 18-8 Stainless Steel flat washer delivers exceptional engineering value in applications where corrosion resistance and environmental compliance are critical. The 18-8 stainless steel base material combined with the black-oxide surface treatment creates a robust barrier against chemical exposure, moisture, and atmospheric conditions that typically degrade standard washers. With precise 0.344" ID x 2" OD dimensions and controlled 0.050-0.080" thickness, this 5/16" compatible washer ensures optimal load distribution while preventing surface damage to connected components. Ideal for industrial machinery, marine equipment, chemical processing systems, and outdoor infrastructure, this flat washer solves common fastener failure points by maintaining structural integrity in challenging operating conditions where both mechanical performance and regulatory compliance are mandatory.

Specification Summary & Compliance

This flat washer features inch system dimensions with 0.344" inner diameter and 2" outer diameter, designed for 5/16" screw size applications. The 0.050-0.080" thickness range ensures consistent performance across production batches. Manufactured from 18-8 stainless steel with black-oxide surface treatment, the washer complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, making it suitable for industrial applications requiring verified material safety and chemical resistance properties.