S-90377A192 0.203" ID x 1.25" OD Oversized Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance thanks to Black-Oxide 18-8 Stainless Steel construction, ideal for harsh environments and long-term reliability.
• Superior load distribution with a large 1.25" outer diameter, reducing surface pressure and preventing damage to assembled materials.
• Enhanced vibration resistance to maintain joint integrity and prevent loosening in dynamic or high-stress applications.
• Precise fit for No. 10 screws with a 0.203" inner diameter, ensuring easy installation and secure fastening.
• Robust and durable performance from a substantial 0.110-0.140" thickness, suitable for heavy-duty industrial use.
• Compliance with environmental regulations, including RoHS 3 and REACH, for safe and sustainable procurement.
• Versatile inch system compatibility, making these flat washers easy to integrate into standard imperial measurement designs.

Professional Applications & Engineering Value

This Black-Oxide 18-8 Stainless Steel flat washer is engineered to address common industrial challenges such as corrosion, vibration-induced failure, and uneven load distribution. The 18-8 stainless steel base material provides inherent resistance to rust and oxidation, while the black-oxide surface treatment adds an extra layer of protection, making it ideal for outdoor, marine, or chemical-exposed applications. Its generous 1.25" OD and sturdy 0.110-0.140" thickness ensure that loads are spread over a wider area, preventing surface indentation and maintaining the integrity of softer materials. Designed for No. 10 screw size, this washer is a reliable choice in machinery assembly, construction, and automotive sectors where consistent performance under stress is critical. The combination of material strength and precise dimensions helps reduce maintenance needs and extends the service life of the entire assembly.

Specification Summary & Compliance

This flat washer features an inner diameter of 0.203", outer diameter of 1.25", and thickness range of 0.110-0.140", conforming to standard inch measurement systems for broad compatibility. It is manufactured from Black-Oxide 18-8 Stainless Steel, ensuring durability and corrosion resistance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, affirming its adherence to environmental safety and hazardous substance restrictions, making it a responsible choice for industrial and engineering projects.