S-90377A182 0.531" ID x 2" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from 18-8 stainless steel with black-oxide finish, ideal for harsh environments and long-term reliability.
• Precise dimensional fit with 0.531" ID and 2" OD, ensuring secure placement and even load distribution under 1/2" fasteners.
• Consistent thickness range (0.050-0.080") provides reliable spacing and vibration dampening in critical assemblies.
• Enhanced durability due to the robust stainless steel material, reducing wear and maintenance needs over time.
• Compliance with strict environmental standards, including RoHS 3 and REACH, for safe and sustainable industrial use.
• Broad compatibility with inch-system components, simplifying sourcing and integration into existing designs.
• Cost-effective performance by minimizing replacement frequency and downtime in demanding applications.

Professional Applications & Engineering Value

This Black-Oxide 18-8 Stainless Steel Flat Washer is engineered to address common industrial challenges such as corrosion-induced failure and inconsistent load distribution. The 18-8 stainless steel material offers excellent resistance to rust and chemicals, making it suitable for outdoor, marine, and chemical processing equipment where moisture exposure is high. The flat washer design with precise inner and outer diameters ensures uniform pressure across surfaces, preventing bolt loosening and material damage in structural assemblies and heavy machinery. By incorporating a black-oxide surface treatment, it adds an extra layer of protection while maintaining a low-profile appearance. This component is ideal for B2B procurement in industries requiring reliable, compliant fasteners that enhance assembly longevity and reduce lifecycle costs.

Specification Summary & Compliance

This flat washer adheres to standard inch-system dimensions with an ID of 0.531", OD of 2", and thickness ranging from 0.050" to 0.080", designed for use with 1/2" screws. It conforms to general industrial specifications for fit and function. 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 applications. Note that hardness is not rated, and it is manufactured to provide consistent performance without specific strength grading.