S-93852A143 1.25" ID x 2.75" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from 18-8 stainless steel construction, ideal for harsh industrial environments and outdoor applications
• Superior load distribution with a large 2.75" outer diameter, preventing surface damage and joint loosening under high stress
• Precise fit for 1 1/8" fasteners with a 1.25" inner diameter, ensuring secure placement and reducing assembly time
• Enhanced durability and deformation resistance thanks to Rockwell B68 hardness, maintaining performance in demanding applications
• Guaranteed dimensional consistency through compliance with ASME B18.21.1 standards, ensuring reliable interchangeability
• Environmental and workplace safety with full RoHS 3 and REACH compliance, meeting strict regulatory requirements
• Versatile industrial compatibility with USS flat washer design, suitable for construction, machinery, and heavy equipment

Professional Applications & Engineering Value

These USS flat washers in 18-8 stainless steel address critical engineering challenges in industrial applications where corrosion and mechanical stress are prevalent. The material's inherent corrosion resistance eliminates rust-related failures in chemical processing, marine, and outdoor settings, while the Rockwell B68 hardness ensures the washer maintains its shape under heavy loads, preventing bolt loosening and surface indentation. With a 2.75" OD and 1.25" ID, they provide optimal load distribution for 1 1/8" screw sizes, reducing point stress on soft materials and extending the service life of assembled components. This makes them indispensable in heavy-duty machinery, structural steel connections, and equipment requiring reliable, long-term fastening solutions without frequent maintenance.

Specification Summary & Compliance

This washer meets ASME B18.21.1 dimensional and manufacturing specifications, ensuring precise fit and performance. It is manufactured from 18-8 stainless steel with a thickness range of 0.136-0.192" and hardness of Rockwell B68. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free of restricted hazardous substances and safe for industrial use.