S-90377A144 0.203" ID x 0.625" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from Black-Oxide 18-8 Stainless Steel, ideal for harsh environments and extending service life.
• Enhanced load distribution with precise 0.203" ID and 0.625" OD, reducing surface pressure and preventing material damage.
• Consistent performance under stress due to Rockwell B68 hardness, maintaining shape and function in demanding applications.
• Reliable fit for No. 10 screws, ensuring secure fastening and minimizing assembly errors.
• Durable surface protection with black-oxide coating, offering added wear resistance and a professional finish.
• Compliance with global standards including RoHS 3 and REACH, ensuring safety and environmental responsibility.
• Versatile thickness range (0.060-0.090") for flexibility in various industrial setups and gap-filling needs.

Professional Applications & Engineering Value

This flat washer is engineered to address common industrial challenges such as galvanic corrosion, vibration loosening, and surface degradation. The Black-Oxide 18-8 Stainless Steel material provides excellent resistance to moisture, chemicals, and oxidation, making it suitable for outdoor, marine, and chemical processing equipment. Its precise dimensions—0.203" ID and 0.625" OD—ensure optimal alignment with No. 10 screw sizes, distributing clamp load evenly to prevent joint failure. With a Rockwell B68 hardness, it withstands repeated stress without deformation, enhancing the longevity of assemblies in machinery, automotive, and electrical enclosures. The black-oxide finish not only adds an extra layer of durability but also reduces light reflection, ideal for sensitive optical or aesthetic applications.

Specification Summary & Compliance

This washer meets standard inch measurement tolerances with an inner diameter of 0.203", outer diameter of 0.625", and thickness ranging from 0.060" to 0.090". It is manufactured from 18-8 Stainless Steel with a black-oxide surface treatment, ensuring consistent performance. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from hazardous substances and safe for various industrial and consumer applications.