S-90474A106 0.281" ID x 0.5" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Precise dimensional fit with 0.281" ID and 0.5" OD ensures optimal load distribution and secure fastening for 1/4" screws.
• Durable steel construction provides excellent strength and resistance to deformation under pressure in demanding applications.
• ASME B18.21.1 compliance guarantees consistent quality, interchangeability, and reliability in industrial assemblies.
• RoHS 3 and REACH compliance ensures environmental safety and material sustainability for global supply chain requirements.
• Standard thickness range (0.056-0.071") offers reliable spacing and surface protection without compromising assembly integrity.
• Ideal for inch-system applications facilitating easy integration with existing North American machinery and components.
• Versatile industrial use from machinery to structural assemblies, enhancing longevity and reducing maintenance needs.

Professional Applications & Engineering Value

This flat washer is engineered to address common industrial challenges such as surface damage, loosening under vibration, and uneven load distribution. Manufactured from high-quality steel, it provides a robust barrier that prevents fastener embedment and distributes clamping force evenly across joined surfaces. The precise 0.281" ID and 0.5" OD ensure a perfect fit for 1/4" screws, reducing the risk of misalignment and improving assembly efficiency. Its compliance with ASME B18.21.1 standards means it delivers consistent performance in automotive, construction, and heavy machinery applications, where reliability and dimensional accuracy are critical. By using these RoHS and REACH compliant washers, engineers can achieve durable, safe, and environmentally responsible fastening solutions.

Specification Summary & Compliance

This flat washer features an inner diameter of 0.281", outer diameter of 0.5", and thickness ranging from 0.056" to 0.071", designed specifically for 1/4" screw sizes in the inch measurement system. It conforms to ASME B18.21.1 specifications, ensuring precise manufacturing tolerances and reliable performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting safe and sustainable industrial practices without the use of restricted hazardous substances.