S-91434A126 1.375" ID x 2.5" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Superior load distribution with precise 1.375" ID and 2.5" OD dimensions to prevent surface damage and joint failure
• Exceptional corrosion resistance from black coated steel construction for extended service life in harsh environments
• Maximum mechanical strength with Grade 8 classification and Rockwell C38 hardness for heavy-duty applications
• Reliable dimensional consistency manufactured to SAE specifications and ASME B18.21.1 standards
• Enhanced safety compliance meeting RoHS 3 and REACH environmental regulations for industrial use
• Optimal fastener compatibility specifically engineered for 1 1/4" screw applications
• Consistent performance maintained through controlled thickness between 0.136-0.160" for uniform pressure distribution

Professional Applications & Engineering Value

These Grade 8 SAE flat washers deliver critical engineering solutions for industrial applications where vibration resistance and joint integrity are paramount. The black corrosion-resistant coated steel construction provides essential protection against environmental degradation in outdoor equipment, construction machinery, and marine applications. With their 1.375" ID x 2.5" OD configuration, these washers effectively distribute clamping force over a wider area, preventing surface indentation and maintaining bolt preload in high-vibration environments. The Rockwell C38 hardness ensures the washers maintain their structural integrity under extreme pressure, making them ideal for heavy equipment, structural steel connections, and automotive assemblies where failure is not an option.

Specification Summary & Compliance

Manufactured to SAE specifications and ASME B18.21.1 standards, these flat washers maintain precise dimensional tolerances with internal diameter of 1.375" and outer diameter of 2.5". The thickness range of 0.136-0.160" ensures consistent performance across all applications. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations confirms environmental responsibility, while the Grade 8 classification guarantees the highest level of mechanical strength for critical fastening systems.