S-90377A186 0.656" ID x 1.375" 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 0.656" ID and 1.375" OD, ensuring secure placement on 5/8" screws
• Durable and long-lasting performance thanks to 18-8 stainless steel material, reducing replacement frequency
• Reliable thickness tolerance between 0.060" and 0.090" for consistent spacing and clamping force
• Compliance with strict environmental standards including RoHS 3 and REACH, ensuring safe and sustainable use
• Versatile inch system compatibility, suitable for various industrial and heavy-duty applications
• Enhanced surface protection from the black-oxide finish, minimizing wear and extending service life

Professional Applications & Engineering Value

This Black-Oxide 18-8 Stainless Steel Flat Washer is engineered to address common industrial challenges such as corrosion, vibration loosening, and material degradation. Its 18-8 stainless steel composition provides excellent resistance to rust and chemicals, making it ideal for outdoor, marine, or chemical processing equipment where moisture and corrosive agents are prevalent. The flat washer design with precise inner diameter (0.656") and outer diameter (1.375") ensures even load distribution, preventing surface damage and maintaining bolt integrity in heavy-duty applications. By using this washer, engineers can enhance assembly reliability, reduce maintenance costs, and ensure long-term performance in demanding environments like construction, automotive, and machinery manufacturing.

Specification Summary & Compliance

This flat washer features an inner diameter of 0.656", outer diameter of 1.375", and thickness range of 0.060"–0.090", designed for use with 5/8" screws in inch measurement systems. It is manufactured from Black-Oxide 18-8 Stainless Steel for consistent quality and durability. The product complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and meets international environmental and safety standards for industrial components.