S-90474A179 0.156" ID x 0.312" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Lightweight aluminum construction reduces overall assembly weight while maintaining structural integrity
• Precision dimensional tolerances ensure perfect fit for No. 6 screws with 0.156" ID and 0.312" OD
• Superior corrosion resistance makes these washers ideal for harsh environments and outdoor applications
• ASME B18.21.1 compliance guarantees consistent quality and performance in industrial applications
• Environmental compliance with RoHS 3 and REACH regulations ensures safe use across global markets
• Optimized thickness range (0.028-0.036") provides reliable load distribution without adding bulk
• Cost-effective solution combining aluminum's durability with manufacturing precision for long service life

Professional Applications & Engineering Value

These aluminum flat washers deliver exceptional engineering value in applications where weight reduction and corrosion resistance are critical. The precision dimensions (0.156" ID x 0.312" OD) ensure perfect alignment with No. 6 screws, preventing thread damage and maintaining uniform clamping force. The aluminum material provides excellent electrical conductivity and non-magnetic properties, making these washers ideal for electronic enclosures, aerospace components, and marine equipment. The controlled thickness variation (0.028-0.036") accommodates manufacturing tolerances while ensuring consistent performance in vibration-prone environments. These ASME B18.21.1 compliant washers solve common industrial challenges including galvanic corrosion, weight optimization, and regulatory compliance requirements.

Specification Summary & Compliance

This flat washer features precise inch system dimensions with 0.156" internal diameter and 0.312" outer diameter, manufactured to ASME B18.21.1 standards for dimensional accuracy and performance. The aluminum construction meets industry specifications for lightweight applications while maintaining excellent mechanical properties. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and global market acceptance. The washer is engineered for No. 6 screw sizes with thickness maintained between 0.028-0.036" for optimal load distribution and fastener performance.