S-90474A134 1.188" ID x 2" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Superior load distribution with 2" outer diameter to prevent surface damage and embedment under high-stress conditions
• Exceptional corrosion resistance through zinc yellow-chromate plating for extended service life in harsh industrial environments
• Guarded against material failure with Rockwell C38 hardness maintaining structural integrity under extreme pressure
• Reliable Grade 8 performance ensuring consistent strength and durability for critical fastener applications
• Precision dimensional control with 1.188" inner diameter providing optimal fit for 1-1/8" screw sizes
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for safe global manufacturing operations
• Industry-standard compatibility manufactured to ASME B18.21.1 specifications for guaranteed interchangeability

Professional Applications & Engineering Value

This Grade 8 flat washer delivers critical engineering solutions where corrosion resistance and structural reliability are paramount. The zinc yellow-chromate plated steel construction provides dual protection against environmental degradation and galvanic corrosion, while the Rockwell C38 hardness ensures maintained flatness under sustained clamping forces. Engineered specifically for 1-1/8" screw sizes, this industrial flat washer prevents joint loosening in heavy machinery, structural steel connections, and high-vibration equipment. The optimized 2" OD distributes bearing pressure effectively across softer materials, while the precise 1.188" ID eliminates play in bolted assemblies. These heavy duty washers serve as essential components in construction, manufacturing, and infrastructure projects where fastener failure is not an option.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 dimensional specifications with inner diameter of 1.188", outer diameter of 2", and thickness range of 0.090-0.112". Constructed from Grade 8 steel with Rockwell C38 hardness and zinc yellow-chromate plating surface treatment. Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, including the latest SVHC updates as of June 2023. Designed for use with 1-1/8" screw sizes in inch measurement system applications.