S-90474A102 0.526" ID x 1.75" OD ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to Black-Oxide 18-8 Stainless Steel, ideal for harsh environments and long-term reliability.
• Precise fit and load distribution with 0.526" ID and 1.75" OD, ensuring secure placement under 1/2" screw heads and reducing surface stress.
• Consistent performance under pressure with Rockwell B68 hardness, providing excellent durability and resistance to deformation.
• Reliable thickness tolerance between 0.060" and 0.090" for uniform spacing and vibration dampening in assembled components.
• Compliance with stringent environmental regulations, including RoHS 3 and REACH, making it safe for global industrial supply chains.
• Enhanced wear and oxidation protection from the black-oxide finish, extending service life in demanding applications.
• Versatile inch-system compatibility, designed for seamless integration with standard 1/2" fasteners in various machinery and equipment.

Professional Applications & Engineering Value

This flat washer is engineered to address common industrial challenges such as galvanic corrosion, component loosening, and premature failure. The Black-Oxide 18-8 Stainless Steel construction provides exceptional resistance to rust and chemical exposure, making it suitable for outdoor, marine, and chemical processing equipment. Its precise inner and outer diameters ensure optimal load distribution, preventing damage to sensitive surfaces and maintaining bolt tension under dynamic loads. With a Rockwell B68 hardness, it withstands high-stress conditions without cracking or wearing down, reducing maintenance frequency and downtime in heavy-duty applications like construction machinery, automotive assemblies, and industrial manufacturing systems.

Specification Summary & Compliance

This flat washer adheres to standard inch measurement specifications with an ID of 0.526", OD of 1.75", and thickness range of 0.060"–0.090", ensuring precise fit for 1/2" screws. It meets industry standards for material quality and dimensional consistency. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances and supporting environmentally responsible procurement.