S-90474A148 0.531" ID x 1" OD ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with galvanized steel construction for extended service life in harsh environments
• Precise dimensional fit with 0.531" ID ensuring secure seating on 1/2" screws without slippage
• Optimal load distribution through 1" OD design that minimizes surface pressure and material stress
• Consistent performance maintained by Rockwell B80 hardness rating for reliable mechanical properties
• Regulatory compliance assurance with full RoHS 3 and REACH adherence for global industrial applications
• Versatile thickness range (0.051-0.080") accommodating various assembly clearance requirements
• Durable zinc coating providing sacrificial protection against rust and environmental degradation

Professional Applications & Engineering Value

This galvanized steel flat washer delivers critical engineering solutions for industrial assemblies requiring corrosion resistance and dimensional precision. The zinc-coated surface actively prevents rust formation in humid or outdoor environments, while the Rockwell B80 hardness ensures the washer maintains its structural integrity under sustained clamping forces. With its specific 0.531" inner diameter engineered for 1/2" fasteners, it eliminates play and distributes load evenly across the 1" outer diameter, preventing joint loosening and surface damage. These industrial washers are particularly valuable in construction, machinery, and outdoor equipment where environmental compliance and long-term reliability are mandatory for operational safety and reduced maintenance cycles.

Specification Summary & Compliance

This inch-system flat washer features precise dimensions of 0.531" ID × 1" OD with thickness tolerance of 0.051-0.080", specifically designed for 1/2" screw size applications. Manufactured from galvanized steel with certified Rockwell B80 hardness, it meets industrial standards for mechanical fasteners. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring adherence to the latest environmental and safety requirements for industrial components.