S-90474A153 0.531" ID x 1.75" OD ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with galvanized steel construction, extending service life in harsh industrial environments.
• Excellent load distribution provided by the large 1.75" outer diameter, preventing surface damage and joint loosening.
• Precise fit for 1/2" screws with 0.531" inner diameter, ensuring secure fastening and reducing installation errors.
• Enhanced durability from Rockwell B80 hardness, maintaining structural integrity under high stress and repeated use.
• Consistent performance with thickness tolerance (0.080-0.120"), guaranteeing reliable sealing and spacing in assemblies.
• Global compliance assurance meeting RoHS 3 and REACH standards, enabling safe use in regulated markets and applications.
• Broad compatibility as an inch-system flat washer, seamlessly integrating with existing industrial equipment and standards.

Professional Applications & Engineering Value

This galvanized steel flat washer is engineered to address critical challenges in industrial applications where corrosion and mechanical stress are prevalent. The zinc coating provides a robust barrier against moisture and chemicals, significantly reducing maintenance costs and downtime in outdoor or aggressive environments. Its optimized dimensions—0.531" ID and 1.75" OD—ensure uniform pressure distribution, which minimizes the risk of material fatigue and bolt loosening in heavy-duty assemblies. By combining Rockwell B80 hardness with precise inch-system threading, this washer delivers reliable performance in construction, machinery, and automotive sectors, enhancing the longevity and safety of fastened joints.

Specification Summary & Compliance

This flat washer adheres to standard inch-system dimensions with an inner diameter of 0.531", outer diameter of 1.75", and thickness ranging from 0.080" to 0.120", designed specifically for 1/2" screw size. It meets industry manufacturing tolerances for consistent fit and function. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring it is free from hazardous substances and safe for use in various industrial and international markets.