S-90474A146 0.281" ID x 0.5" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion protection with galvanized steel construction, extending service life in harsh environments
• Precise dimensional fit with 0.281" ID and 0.5" OD ensuring perfect alignment with 1/4" screws
• Optimized load distribution through 0.056-0.071" thickness range, preventing surface damage and loosening
• Industry-standard compliance with ASME B18.21.1 specifications for reliable mechanical performance
• Environmental regulation adherence through RoHS 3 and REACH compliance for global supply chain compatibility
• Durable zinc coating providing sacrificial protection against rust and chemical degradation
• Universal inch system compatibility for seamless integration with North American industrial equipment

Professional Applications & Engineering Value

These galvanized steel flat washers deliver critical engineering solutions where corrosion resistance and dimensional precision are paramount. The zinc-coated surface actively protects against moisture, chemicals, and atmospheric exposure - addressing common failure points in outdoor infrastructure, marine equipment, and industrial machinery. With exacting 0.281" ID specifications for 1/4" screw applications, these components eliminate play and distribute clamping forces evenly across joint surfaces. The ASME B18.21.1 certification ensures consistent performance in high-vibration environments, making them ideal for automotive assemblies, structural steel connections, and heavy-duty equipment maintenance where fastener integrity directly impacts operational safety and longevity.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 standards with dimensional tolerances of 0.281" inner diameter, 0.5" outer diameter, and 0.056-0.071" thickness range. These flat washers comply with RoHS 3 (2015/863/EU) restrictions on hazardous substances and meet REACH (EC 1907/2006) requirements for chemical safety. The inch system measurement ensures compatibility with North American industrial specifications and 1/4" screw applications across commercial and industrial sectors.