S-90474A135 1.312" ID x 2.25" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Exceptional Load Distribution with 2.25" outer diameter to prevent surface damage and embedment in softer materials
• Superior Corrosion Protection through zinc yellow-chromate plating that resists industrial environmental factors
• High-Strength Performance meeting Grade 8 requirements for demanding applications requiring reliable fastener integrity
• Precise Fitment with 1.312" inner diameter specifically engineered for 1 1/4" screw sizes
• Enhanced Durability with Rockwell C38 hardness maintaining structural integrity under heavy loads
• Regulatory Compliance with RoHS 3 and REACH standards for safe use across global markets
• Industry Standard Compatibility manufactured to ASME B18.21.1 specifications for consistent performance

Professional Applications & Engineering Value

These Grade 8 flat washers deliver critical engineering solutions for industrial applications where fastener failure is not an option. The zinc yellow-chromate plated steel construction provides dual protection against corrosion and wear, significantly extending service life in harsh environments. With Rockwell C38 hardness and ASME B18.21.1 compliance, these washers maintain dimensional stability under extreme pressure, preventing joint loosening in heavy machinery, structural steel connections, and industrial equipment. The precise 1.312" ID ensures optimal fit for 1 1/4" fasteners, distributing clamp load effectively across the 2.25" OD to protect sensitive surfaces and prevent material deformation. Ideal for construction, manufacturing, and maintenance applications requiring high-strength washers with reliable corrosion resistance.

Specification Summary & Compliance

This heavy-duty flat washer features precise dimensional specifications with 1.312" inner diameter, 2.25" outer diameter, and thickness ranging 0.146-0.174". Manufactured to ASME B18.21.1 standards with Grade 8 strength classification and Rockwell C38 hardness verification. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for industrial applications worldwide.