S-90474A169 1.312" ID x 2.25" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with black-oxide steel finish, extending service life in demanding environments
• Precise dimensional fit with 1.312" ID specifically engineered for 1 1/4" screw applications
• Optimal load distribution through 2.25" OD design, minimizing surface stress and material fatigue
• Enhanced mechanical stability with consistent 0.146-0.174" thickness range for uniform compression
• Guaranteed interchangeability through strict compliance with ASME B18.21.1 dimensional standards
• Environmental responsibility with full RoHS 3 and REACH compliance for global regulatory acceptance
• Heavy-duty performance in industrial assemblies requiring reliable, long-lasting fastener components

Professional Applications & Engineering Value

These black-oxide steel flat washers deliver critical engineering solutions where corrosion resistance and dimensional precision are paramount. The black-oxide surface treatment creates a protective barrier against oxidation and environmental degradation, significantly extending component life in industrial machinery, construction equipment, and outdoor applications. Engineered to ASME B18.21.1 standards, these washers ensure perfect compatibility with 1 1/4" screw sizes, providing reliable load distribution that prevents joint loosening and material deformation. The optimized 2.25" outer diameter maximizes bearing surface area while the precise 1.312" inner diameter guarantees secure fitment, making them ideal for heavy-duty assemblies requiring consistent performance under vibration and dynamic loading conditions.

Specification Summary & Compliance

This flat washer features dimensional specifications of 1.312" ID × 2.25" OD with thickness ranging 0.146-0.174", specifically designed for 1 1/4" screw applications. Manufactured in compliance with ASME B18.21.1 dimensional standards for inch-series flat washers. The product meets RoHS 3 (2015/863/EU) compliance requirements and is REACH (EC 1907/2006) compliant with current SVHC documentation as of June 14, 2023, ensuring environmental regulatory adherence for international industrial applications.