S-90108A172 0.375" ID x 0.875" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction for extended service life in harsh industrial environments
• Precise dimensional fit with 0.375" ID and 0.875" OD ensuring perfect alignment with 5/16" fasteners
• Enhanced load distribution through USS flat design that prevents surface damage and maintains joint integrity
• High-strength performance with Grade 5 classification suitable for demanding mechanical applications
• Industry-standard compliance meeting ASME B18.21.1 specifications for reliable, predictable performance
• Environmental responsibility with RoHS 3 and REACH compliance for safe, sustainable industrial use
• Versatile thickness range from 0.064" to 0.104" providing optimal spacing and tension adjustment capabilities

Professional Applications & Engineering Value

These USS flat washers deliver exceptional engineering value in industrial applications where vibration resistance and surface protection are critical. The zinc-plated steel construction provides a durable barrier against corrosion, significantly extending component life in environments exposed to moisture and chemicals. With precise 0.375" inner diameter and 0.875" outer diameter dimensions, these washers ensure perfect fitment with 5/16" screws, preventing loosening under dynamic loads. The Grade 5 strength classification makes them ideal for heavy machinery, structural assemblies, and automotive applications where reliable load distribution is essential. Manufactured to ASME B18.21.1 standards, these washers provide consistent performance across batch productions, reducing installation time and maintenance costs.

Specification Summary & Compliance

This USS flat washer features dimensional specifications of 0.375" inner diameter, 0.875" outer diameter, and thickness ranging from 0.064" to 0.104". The product conforms to ASME B18.21.1 manufacturing standards and carries Grade 5 strength classification. Compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental safety and regulatory acceptance for industrial applications worldwide. The inch system measurement provides compatibility with standard imperial fastener systems.