S-93852A182 1.25" ID x 2.75" 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, ideal for harsh industrial environments
• Exceptional load distribution thanks to USS flat design with 2.75" OD, preventing surface damage and fastener loosening
• Reliable hardness performance with Rockwell B68 rating ensuring consistent durability under heavy loads
• Precision dimensional fit with 1.25" ID specifically engineered for 1 1/8" screw sizes
• Industry-standard compliance manufactured to ASME B18.21.1 specifications for guaranteed interchangeability
• Enhanced chemical resistance from black-oxide surface treatment, extending service life in corrosive conditions
• Environmental regulation compliance meeting RoHS 3 and REACH standards for global industrial applications

Professional Applications & Engineering Value

These USS flat washers provide critical engineering solutions where corrosion resistance and load distribution are paramount. The black-oxide 18-8 stainless steel construction offers superior protection against rust and chemical degradation in demanding environments like marine applications, chemical processing plants, and outdoor infrastructure. The precise 1.25" ID and 2.75" OD dimensions ensure optimal surface contact for 1 1/8" screw sizes, preventing joint failure and material deformation. Engineered to ASME B18.21.1 standards, these washers deliver consistent performance in heavy machinery, structural steel connections, and industrial equipment where vibration resistance and long-term reliability are critical. The combination of material strength and surface treatment makes them ideal for applications requiring both mechanical integrity and environmental durability.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 dimensional standards with precise internal diameter of 1.25" and outer diameter of 2.75" for proper fit with 1 1/8" fasteners. The 18-8 stainless steel material provides excellent mechanical properties with Rockwell B68 hardness rating. Thickness tolerance maintained between 0.136-0.192" for consistent performance. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use in industrial applications worldwide.