S-90474A175 0.344" ID x 0.875" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Lightweight corrosion resistance from aluminum construction reduces component weight while maintaining durability in various environments.
• Precise dimensional fit with 0.344" ID ensures secure seating on 5/16" screws, preventing loosening and maintaining assembly integrity.
• Optimal load distribution through the 0.875" OD design minimizes surface pressure and prevents damage to connected materials.
• Consistent performance guaranteed by adherence to ASME B18.21.1 standards, ensuring reliable mechanical properties and interchangeability.
• Enhanced safety compliance with RoHS 3 and REACH environmental regulations, making them suitable for sensitive applications and global supply chains.
• Versatile thickness range of 0.056-0.071" allows for flexibility in accommodating slight variations in assembly tolerances.
• Broad industrial compatibility with inch measurement systems simplifies sourcing and replacement in North American and global markets.

Professional Applications & Engineering Value

This aluminum flat washer is engineered to address critical challenges in industrial assemblies, such as galvanic corrosion and weight reduction. The aluminum material provides excellent resistance to oxidation without the need for additional coatings, making it ideal for electrical enclosures, aerospace components, and marine hardware where non-magnetic, lightweight properties are essential. Its precise 0.344" ID and 0.875" OD dimensions, compliant with ASME B18.21.1, ensure uniform load distribution, preventing bolt head embedment and surface damage in soft materials. By utilizing these flat washers, engineers can enhance assembly longevity, reduce maintenance cycles, and meet stringent RoHS 3 and REACH environmental standards, supporting sustainable manufacturing practices.

Specification Summary & Compliance

This washer features an internal diameter of 0.344", external diameter of 0.875", and thickness ranging from 0.056" to 0.071", designed for use with 5/16" screws in inch measurement systems. It conforms to ASME B18.21.1 specifications for dimensional accuracy and mechanical consistency. The product is verified as RoHS 3 (2015/863/EU) Compliant and REACH (EC 1907/2006) Compliant (as of 06/14/2023, 235 SVHC), ensuring adherence to environmental and safety regulations for industrial applications.