S-93852A164 2.125" ID x 4.5" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with 18-8 stainless steel construction and black-oxide coating for extended service life in harsh environments
• Optimal load distribution through USS flat design with 4.5" outer diameter, preventing surface damage and joint loosening
• Precise fit for 2" fasteners with 2.125" inner diameter ensuring secure installation and alignment
• Enhanced durability with thickness ranging from 0.153" to 0.213" for reliable performance under heavy loads
• Industry-standard compliance meeting ASME B18.21.1 specifications for consistent quality and interchangeability
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated applications
• Versatile inch system compatibility designed for seamless integration with standard industrial equipment

Professional Applications & Engineering Value

These USS flat washers provide critical engineering solutions where corrosion resistance and load-bearing capacity are paramount. The black-oxide 18-8 stainless steel construction offers exceptional protection against rust and chemical degradation, making them ideal for outdoor infrastructure, marine equipment, and chemical processing facilities. The generous 4.5" outer diameter effectively distributes clamping force across wider surfaces, preventing material deformation and maintaining bolt tension in heavy-duty applications. Engineered to ASME B18.21.1 standards, these industrial washers deliver predictable performance in structural connections, machinery assembly, and maintenance operations where reliability cannot be compromised.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 dimensional standards with inner diameter of 2.125" and outer diameter of 4.5" for compatibility with 2" screw sizes. Thickness tolerance maintained between 0.153-0.213" for consistent performance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in global industrial markets. Material certification confirms 18-8 stainless steel composition with black-oxide surface treatment for enhanced corrosion protection.