S-90377A194 0.281" ID x 0.625" 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 fit and load distribution with 0.281" ID and 0.625" OD, ensuring secure placement and reduced surface pressure.
• Enhanced durability from the stainless steel material, providing long-lasting performance without rust or degradation.
• Reliable compatibility for 1/4" screws, minimizing assembly errors and improving installation efficiency.
• Consistent thickness range of 0.170-0.200" for uniform spacing and vibration resistance in mechanical applications.
• Environmental compliance with RoHS 3 and REACH standards, ensuring safe use in regulated industries.
• Versatile inch system sizing for seamless integration with existing equipment and global engineering designs.

Professional Applications & Engineering Value

This Black-Oxide 18-8 Stainless Steel flat washer is engineered to address common industrial challenges such as corrosion, fastener loosening, and surface damage. The Black-Oxide surface treatment enhances corrosion resistance, making it suitable for outdoor, marine, or chemical-exposed applications where moisture and contaminants are prevalent. With precise inner and outer diameters (0.281" ID and 0.625" OD), it ensures optimal load distribution, preventing bolt head embedding and material stress in assemblies using 1/4" screws. Its robust stainless steel build maintains integrity under vibration and thermal cycling, reducing maintenance needs in machinery, automotive, and construction sectors. By combining inch-system compatibility with high-performance materials, this washer delivers reliable sealing and longevity in demanding engineering environments.

Specification Summary & Compliance

This flat washer adheres to standard inch measurements with an ID of 0.281", OD of 0.625", and thickness ranging from 0.170" to 0.200" for consistent performance. It is designed for use with 1/4" screws and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for industrial applications. The material, 18-8 Stainless Steel with Black-Oxide finish, provides reliable corrosion resistance and durability without a rated hardness, making it a versatile choice for general-purpose fastening needs.