S-93852A162 1.75" ID x 3.75" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide 18-8 stainless steel construction, ideal for harsh industrial environments
• Enhanced load distribution due to USS flat design with 3.75" OD and 1.75" ID, preventing surface damage
• Reliable dimensional stability with thickness ranging 0.153-0.213" for consistent performance under pressure
• Broad compatibility with 1 5/8" screw sizes, simplifying assembly in various mechanical setups
• Strict quality assurance through compliance with ASME B18.21.1 standards for precise engineering
• Environmental and safety compliance with RoHS 3 and REACH regulations, ensuring safe usage
• Durable surface protection from black-oxide finish, reducing wear and extending service life

Professional Applications & Engineering Value

These USS flat washers are engineered to address critical challenges in industrial applications where corrosion, high loads, and long-term reliability are concerns. The black-oxide 18-8 stainless steel material offers exceptional resistance to rust and chemical exposure, making these washers suitable for outdoor machinery, marine equipment, and chemical processing plants. The flat design with a large 3.75" OD and precise 1.75" ID ensures even pressure distribution, reducing the risk of bolt loosening or joint failure. By adhering to ASME B18.21.1 standards, these washers provide consistent performance in heavy-duty assemblies, from construction frameworks to automotive systems, delivering engineering value through enhanced safety and reduced maintenance costs.

Specification Summary & Compliance

This washer meets dimensional specifications with an inner diameter of 1.75", outer diameter of 3.75", and thickness range of 0.153-0.213", designed for use with 1 5/8" screw sizes. It conforms to the ASME B18.21.1 standard for flat washers in the inch system, ensuring precise tolerances and reliable fit. Additionally, the product is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental safety and restricted substance management in industrial supply chains.