S-91081A034 0.625" ID x 1.469" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Enhanced Load Distribution - The large 1.469" outer diameter effectively spreads pressure, protecting surfaces and preventing fastener embedment in softer materials.
• Precise Fit for 9/16" Fasteners - A 0.625" inner diameter ensures a secure and accurate fit, reducing assembly time and improving joint integrity.
• Rugged Steel Construction - Manufactured from durable steel, this washer provides reliable strength and long-term corrosion resistance for demanding environments.
• Assured Dimensional Consistency - Compliance with the ASME B18.21.1 standard guarantees uniform thickness and precise geometry for predictable performance.
• Unrestricted Global Compliance - Meets RoHS 3 and REACH environmental directives, making it suitable for international supply chains and regulated industries.
• Versatile Industrial Application - The robust USS designation makes it ideal for heavy-duty machinery, structural steelwork, and general construction applications.
• Optimized for Inch-System Projects - Designed for imperial measurement systems, ensuring seamless integration with existing North American tooling and specifications.

Professional Applications & Engineering Value

This USS flat washer is engineered to solve critical challenges in heavy-load applications. Its steel construction and substantial outer diameter are key to preventing joint failure by distributing clamp load over a wider area, which counters surface damage and bolt loosening under vibration. This is vital in structural steel connections, heavy machinery assembly, and construction frameworks where integrity is non-negotiable. The washer's compliance with the ASME B18.21.1 standard ensures dimensional reliability, simplifying procurement and quality control for engineers and procurement specialists. Its RoHS and REACH compliance further adds value for companies with strict environmental and supply chain mandates, making it a responsible and high-performance choice for global industrial projects.

Specification Summary & Compliance

This washer features an Inner Diameter (ID) of 0.625" and an Outer Diameter (OD) of 1.469", with a thickness ranging from 0.086" to 0.132". It is designed for a 9/16" screw size and is manufactured in accordance with the ASME B18.21.1 standard, ensuring precise dimensional tolerances. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations.