S-90377A148 0.266" ID x 0.562" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with Black-Oxide 18-8 Stainless Steel construction, ideal for humid or chemically aggressive environments.
• Enhanced load distribution due to precise 0.266" ID and 0.562" OD dimensions, reducing surface pressure and preventing material damage.
• Excellent durability from Rockwell B68 hardness, maintaining shape and function under repeated stress.
• Reliable fit for 1/4" screws, ensuring secure fastening and minimizing loosening in mechanical assemblies.
• Consistent performance with a thickness range of 0.050-0.080", accommodating minor variations in installation.
• Environmental and safety compliance with RoHS 3 and REACH standards, safe for use in regulated industries.
• Long-term cost efficiency by resisting rust and wear, lowering maintenance and replacement frequency.

Professional Applications & Engineering Value

This flat washer is engineered to address common industrial challenges like fastener corrosion and joint failure. Made from Black-Oxide 18-8 Stainless Steel, it provides a protective layer that combats oxidation and chemical exposure, making it suitable for outdoor equipment, marine hardware, and food processing machinery. The precise 1/4" screw size compatibility and uniform thickness ensure even load distribution, preventing stress concentration and extending the life of assembled components. Its Rockwell B68 hardness offers resilience against deformation, while compliance with environmental regulations like RoHS and REACH ensures it meets strict industry standards for safety and sustainability.

Specification Summary & Compliance

This washer features an inner diameter of 0.266", outer diameter of 0.562", and thickness ranging from 0.050" to 0.080", designed for standard 1/4" screw applications in inch measurement systems. It conforms to typical industrial tolerances for flat washers and is manufactured from 18-8 Stainless Steel with a black-oxide finish for added protection. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for various engineering uses.