S-93852A177 0.688" ID x 1.75" 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 finish, ideal for harsh industrial environments
• Enhanced load distribution from USS flat design with 1.75" OD, preventing surface damage and loosening under heavy loads
• Precise fit for 5/8" fasteners with 0.688" ID, ensuring secure assembly and vibration resistance
• Consistent mechanical performance with Rockwell B68 hardness, maintaining dimensional stability under stress
• Guaranteed dimensional accuracy through ASME B18.21.1 compliance, ensuring reliable interchangeability
• Environmental and workplace safety with full RoHS 3 and REACH compliance, meeting global regulatory standards
• Durable thickness range (0.108-0.160") providing optimal compression and longevity in demanding applications

Professional Applications & Engineering Value

These USS flat washers deliver critical engineering value by solving common industrial challenges like galvanic corrosion, joint failure, and regulatory non-compliance. The black-oxide 18-8 stainless steel construction provides an exceptional barrier against moisture, chemicals, and atmospheric exposure, significantly extending service life in outdoor, marine, and chemical processing equipment. Their inch-system dimensions and ASME B18.21.1 certification ensure perfect compatibility with existing 5/8" fastener assemblies, eliminating installation errors. The robust Rockwell B68 hardness prevents deformation under high clamp loads, making them ideal for heavy machinery, structural steel connections, and automotive applications where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

This USS flat washer meets ASME B18.21.1 dimensional standards with precise inch-system specifications: 0.688" ID, 1.75" OD, and thickness ranging 0.108-0.160". Manufactured from 18-8 stainless steel with black-oxide surface treatment, it maintains consistent Rockwell B68 hardness for reliable performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and unrestricted use in global industrial supply chains.