S-91081A050 3.125" ID x 5.5" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Superior load distribution across large 5.5" OD surface area prevents joint loosening and material damage
• Precise dimensional accuracy with 3.125" ID ensures perfect fit for 3" screw applications
• Heavy-duty construction from durable steel provides reliable performance in demanding industrial environments
• Standard compliance assurance with ASME B18.21.1 guarantees consistent quality and interchangeability
• Environmental responsibility through RoHS 3 and REACH compliance for safe industrial usage
• Versatile thickness range (0.249-0.327") accommodates various assembly requirements and compression needs
• Corrosion-resistant properties of steel material ensure long-term reliability in harsh operating conditions

Professional Applications & Engineering Value

This USS flat washer delivers critical engineering solutions for heavy-duty industrial applications where reliable load distribution is paramount. The substantial 5.5" outer diameter creates an optimal bearing surface that effectively distributes clamping force, preventing surface damage and joint failure in structural connections, machinery assemblies, and construction projects. Manufactured from high-quality steel, this inch system washer maintains dimensional stability under significant pressure, while its precise 3.125" inner diameter ensures perfect alignment with 3" fasteners. The robust construction addresses common industry challenges including vibration-induced loosening, surface indentation, and premature joint failure, making it ideal for construction equipment, industrial machinery, and structural steel applications where performance cannot be compromised.

Specification Summary & Compliance

This USS specification flat washer features precise dimensional parameters with 3.125" inner diameter, 5.5" outer diameter, and thickness ranging from 0.249" to 0.327". Manufactured in compliance with ASME B18.21.1 standards for dimensional accuracy and performance requirements. The product fully complies with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) requirements (updated 06/14/2023, 235 SVHC), ensuring environmental responsibility and workplace safety. Designed specifically for use with 3" screw sizes in inch measurement system applications.