S-90377A205 0.578" ID x 1.062" 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 extending service life.
• Excellent load distribution with a wide outer diameter (1.062" OD), protecting surfaces and preventing fastener embedment.
• Precise fit and secure fastening ensured by the 0.578" inner diameter, designed specifically for 9/16" screws.
• Durable and reliable performance from a consistent thickness range (0.110-0.140"), maintaining structural integrity under pressure.
• Compliance with stringent environmental regulations, being RoHS 3 and REACH compliant for safe, global industrial use.
• Versatile inch system compatibility, making it easy to integrate into existing imperial measurement-based assemblies.
• Enhanced wear resistance due to the robust stainless steel material, reducing maintenance needs and downtime.

Professional Applications & Engineering Value

This 9/16" flat washer in Black-Oxide 18-8 Stainless Steel is engineered to address common industrial challenges such as corrosion, surface damage, and assembly failure. The 18-8 stainless steel composition provides excellent resistance to rust and chemical exposure, while the black-oxide surface treatment adds an extra layer of protection against wear and galling. Its precise dimensions, including a 0.578" ID and 1.062" OD, ensure optimal load distribution, preventing stress concentration on connected parts. Ideal for applications in machinery, construction, and marine environments, this washer helps reduce maintenance costs and extends the lifespan of fastening systems by offering reliable performance under varying loads and conditions.

Specification Summary & Compliance

This flat washer features an inner diameter of 0.578", outer diameter of 1.062", and thickness ranging from 0.110" to 0.140", designed for use with 9/16" screws in inch measurement systems. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it meets environmental and safety standards for industrial components. Manufactured from high-quality 18-8 stainless steel, it is suitable for applications requiring durability and corrosion resistance without specific hardness ratings.