S-90474A141 0.531" ID x 1" OD ASME Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance with black-oxide steel coating, ideal for humid or outdoor industrial environments
• Superior load distribution due to precise 0.531" ID and 1" OD dimensions, minimizing surface damage and loosening
• Consistent mechanical strength ensured by Rockwell B80 hardness, providing reliable performance under repeated stress
• Accurate fit for 1/2" screws with inch system specifications, ensuring easy installation and secure fastening
• Durable material construction offering long service life in heavy-duty applications, reducing replacement frequency
• Compliance with global safety standards including RoHS 3 and REACH, guaranteeing safe use in regulated industries
• Versatile thickness range (0.051-0.080") allowing for flexibility in assembly gaps and vibration dampening needs

Professional Applications & Engineering Value

This black-oxide steel flat washer is engineered to address common industrial challenges such as fastener corrosion, uneven load distribution, and mechanical failure in demanding settings. The black-oxide surface treatment provides a protective layer that significantly reduces rust and wear, making it suitable for applications in automotive assembly, construction machinery, and outdoor equipment where exposure to moisture is frequent. With its Rockwell B80 hardness, the washer maintains structural integrity under high-pressure conditions, preventing deformation and ensuring consistent clamping force. Its precise 0.531" ID and 1" OD dimensions in the inch system allow for exact fitting with 1/2" screws, minimizing play and enhancing joint stability in heavy-duty mechanical systems. This combination of material durability and dimensional accuracy delivers reliable performance, reducing maintenance downtime and improving overall assembly efficiency.

Specification Summary & Compliance

This flat washer adheres to standard inch measurement tolerances, with an inner diameter of 0.531", outer diameter of 1", and thickness ranging from 0.051" to 0.080", designed specifically for 1/2" screw sizes. It meets industry-standard hardness requirements at Rockwell B80 and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance for global industrial use.