S-90108A030 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, extending service life in demanding industrial environments
• Precise dimensional compatibility with 0.375" ID and 0.875" OD ensuring perfect fit for 5/16" screw applications
• Optimized load distribution through USS standard flat design, preventing surface damage and maintaining joint integrity
• Enhanced durability with controlled thickness range (0.064-0.104") providing consistent performance under vibration and stress
• Regulatory compliance assurance meeting both RoHS 3 and REACH environmental standards for global supply chain compatibility
• Industry-standard reliability manufactured to ASME B18.21.1 specifications for consistent quality and interchangeability
• Versatile application readiness suitable for various industrial assemblies requiring corrosion-resistant inch fasteners

Professional Applications & Engineering Value

These zinc-plated steel flat washers deliver critical engineering solutions where corrosion prevention and dimensional precision are paramount. The USS standard design ensures optimal load distribution across mating surfaces, effectively preventing embedment and surface damage in industrial equipment assemblies. The zinc plating creates a sacrificial barrier that significantly extends component life in humid or chemically aggressive environments. Engineered to ASME B18.21.1 specifications, these washers maintain consistent thickness tolerances (0.064-0.104") for reliable performance in vibration-prone applications using 5/16" fasteners. Their compliance with international environmental regulations makes them ideal for OEM manufacturing and MRO operations requiring both technical performance and supply chain compliance.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 dimensional standards with precise inner diameter (0.375") and outer diameter (0.875") specifications. Features controlled thickness range of 0.064-0.104" for consistent performance. Material composition and plating process fully comply with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and global market acceptance. Designed specifically for use with 5/16" screw sizes in inch measurement system applications.