S-96582A438 1.875" ID x 4" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Superior corrosion protection with black-coated steel to extend service life in harsh industrial environments
• Precise dimensional fit with 1.875" ID and 4" OD ensuring reliable performance with 1 3/4" screw sizes
• Robust load distribution through substantial 0.153-0.213" thickness for enhanced joint stability
• Industry-standard compliance with ASME B18.21.1 specifications for guaranteed mechanical performance
• Environmental regulation adherence meeting RoHS 3 and REACH requirements for safe global procurement
• USS designation compatibility designed for general service applications requiring proven reliability
• Durable steel construction providing consistent performance under mechanical stress and vibration

Professional Applications & Engineering Value

This USS flat washer delivers critical engineering solutions where corrosion resistance and dimensional precision are paramount. The black corrosion-resistant coated steel construction protects against environmental degradation in outdoor installations, chemical processing, and marine applications. With its substantial 4" OD and precise 1.875" ID, this flat washer effectively distributes clamping forces over wider surface areas, preventing joint loosening and material deformation in heavy-duty industrial assemblies. The ASME B18.21.1 compliance ensures consistent performance in construction equipment, structural steel connections, and machinery where inch system fasteners are specified. Engineered for 1 3/4" screw sizes, it maintains bolt tension while providing a protective barrier between mating surfaces.

Specification Summary & Compliance

This USS flat washer features precise dimensional specifications including 1.875" inner diameter, 4" outer diameter, and thickness ranging 0.153-0.213". Manufactured to ASME B18.21.1 standards for dimensional accuracy and mechanical properties. The product maintains full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and unrestricted industrial use. Designed specifically for 1 3/4" screw sizes within the inch measurement system, this corrosion-resistant washer meets rigorous industrial requirements for reliability and performance consistency.