S-90474A136 1.562" ID x 2.75" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc yellow-chromate plating, ensuring long-term reliability in harsh industrial environments.
• Superior load distribution thanks to the precise 1.562" ID and 2.75" OD, reducing stress on fastened components.
• High tensile strength and durability from Grade 8 classification and Rockwell C38 hardness, ideal for heavy-duty applications.
• Guaranteed dimensional accuracy per ASME B18.21.1 standards, ensuring consistent performance and easy installation.
• Environmental compliance with RoHS 3 and REACH regulations, making it safe for regulated industries.
• Optimized for 1 1/2" screws, providing secure fastening and preventing loosening under vibration or load.
• Robust material integrity from plated steel, offering excellent wear resistance and extended service life.

Professional Applications & Engineering Value

This Grade 8 flat washer is engineered to address critical challenges in demanding industrial settings, such as machinery assembly, structural frameworks, and heavy equipment manufacturing. The zinc yellow-chromate plated steel construction delivers outstanding corrosion resistance, protecting against rust and degradation in humid or chemically aggressive environments. With a Rockwell C38 hardness and compliance with ASME B18.21.1, it ensures precise fit and reliable performance under high-stress conditions, preventing bolt loosening and material fatigue. Ideal for use with 1 1/2" screw sizes, this washer distributes loads evenly, reducing the risk of surface damage and enhancing the longevity of connected components in construction, automotive, and aerospace applications.

Specification Summary & Compliance

This flat washer features an inner diameter of 1.562", outer diameter of 2.75", and thickness ranging from 0.146" to 0.174", manufactured to ASME B18.21.1 standards for dimensional accuracy and performance. It complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and suitability for global industrial use. The Grade 8 strength classification and inch system measurements guarantee reliable fastening in heavy-duty applications.