S-90377A181 0.531" ID x 1.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide 18-8 Stainless Steel construction for extended service life in harsh environments
• Precise dimensional fit with 0.531" ID and 1.5" OD ensuring optimal load distribution and secure fastening
• Versatile thickness range (0.050-0.080") accommodates various assembly requirements and compensates for surface irregularities
• Reliable performance for 1/2" screw applications, maintaining joint integrity under industrial conditions
• Environmental compliance with RoHS 3 and REACH standards, meeting global regulatory requirements
• Durable surface treatment providing enhanced wear resistance and consistent performance in mechanical assemblies
• Inch system compatibility ensuring seamless integration with existing industrial equipment and standards

Professional Applications & Engineering Value

Engineered for demanding industrial environments, these Black-Oxide 18-8 Stainless Steel flat washers deliver exceptional corrosion resistance where moisture, chemicals, or outdoor exposure would compromise ordinary fasteners. The precision 0.531" ID ensures perfect alignment with 1/2" screws, while the generous 1.5" OD distributes clamping force effectively to prevent surface damage and maintain joint integrity. The controlled 0.050-0.080" thickness range accommodates minor surface variations in assembly applications, making these industrial washers ideal for machinery, structural frameworks, and equipment where vibration resistance and long-term reliability are critical. The black-oxide finish enhances both aesthetic appeal and surface durability in visible applications.

Specification Summary & Compliance

This flat washer features inch system dimensions with internal diameter of 0.531", outer diameter of 1.5", and thickness range of 0.050-0.080". Manufactured from 18-8 Stainless Steel with black-oxide surface treatment, it's engineered for use with 1/2" screw sizes. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.