S-90474A149 0.531" ID x 1.25" OD ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with galvanized steel construction, extending service life in harsh environments.
• Precise fit for 1/2" screws with a 0.531" ID, ensuring secure fastening and reducing assembly errors.
• Optimal load distribution due to the 1.25" OD, minimizing surface damage and improving joint integrity.
• Consistent thickness (0.080-0.120") provides reliable performance and uniform pressure in various applications.
• Enhanced durability with Rockwell B80 hardness, resisting deformation under high stress.
• Compliance with RoHS 3 and REACH regulations ensures safe, eco-friendly use in industrial settings.
• Versatile inch-system design for seamless integration with standard hardware, simplifying procurement.

Professional Applications & Engineering Value

This galvanized steel flat washer is engineered to address common industrial challenges, such as corrosion and fastener failure. Its zinc coating provides a protective barrier against moisture and chemicals, making it ideal for outdoor machinery, construction projects, and marine equipment. The precise 0.531" ID and 1.25" OD ensure a snug fit on 1/2" screws, distributing loads evenly to prevent loosening and surface indentation. With a Rockwell B80 hardness, it maintains structural integrity under vibration and heavy loads, reducing maintenance needs. This inch-system washer supports efficient assembly in automotive, HVAC, and structural applications, delivering long-term reliability and cost savings.

Specification Summary & Compliance

This flat washer features an ID of 0.531", OD of 1.25", and thickness range of 0.080-0.120", designed for use with 1/2" screws in inch measurement systems. It meets standard dimensional tolerances for industrial washers and is manufactured from galvanized steel with a Rockwell B80 hardness for consistent performance. 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 global industrial applications.