S-98189A130 0.188" ID x 0.438" OD ASME B18.21.1 General Purpose Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with A286 stainless steel material, ideal for harsh industrial environments and extending service life.
• Enhanced load distribution due to precise 0.188" ID and 0.438" OD dimensions, reducing stress on No. 8 screw assemblies.
• Exceptional durability and wear resistance from Rockwell C22 hardness, ensuring reliable performance under high mechanical stress.
• Guaranteed dimensional accuracy in compliance with ASME B18.21.1 standards, providing consistent fit and function.
• Environmental and safety compliance with RoHS 3 and REACH regulations, meeting strict industry requirements for hazardous substance control.
• Versatile application support for various industrial uses, thanks to the flat washer design and inch measurement system.
• Optimized thickness range (0.036-0.065") for flexibility in assembly, accommodating slight variations without compromising performance.

Professional Applications & Engineering Value

This A286 stainless steel flat washer is engineered to address common challenges in industrial settings, such as corrosion-induced failures and inconsistent load distribution. Made from high-strength A286 stainless steel, it resists oxidation and chemical exposure, making it suitable for demanding environments like aerospace, automotive, and heavy machinery. The precise 0.188" ID and 0.438" OD ensure a secure fit for No. 8 screws, minimizing loosening and vibration issues. With a Rockwell C22 hardness, it withstands repetitive stress, reducing maintenance needs. Compliant with ASME B18.21.1, this washer delivers reliable performance in applications requiring tight tolerances and long-term durability, while its RoHS 3 and REACH compliance supports eco-friendly industrial practices.

Specification Summary & Compliance

This flat washer adheres to ASME B18.21.1 standards, ensuring precise dimensional control with an inner diameter of 0.188", outer diameter of 0.438", and thickness ranging from 0.036" to 0.065". It is manufactured from A286 stainless steel with a hardness of Rockwell C22 for consistent mechanical properties. The product fully complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming its safety for use in restricted substance-sensitive applications.