S-91081A041 1.625" ID x 3.5" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Superior Load Distribution - Large 3.5" OD surface area effectively spreads pressure, preventing surface damage and joint loosening under heavy loads
• Precision Fit Guarantee - 1.625" ID ensures perfect compatibility with 1 1/2" screw sizes, eliminating installation issues and misalignment
• Robust Steel Construction - High-quality steel material provides excellent durability and reliable performance in demanding industrial environments
• Industry Standard Compliance - Manufactured to ASME B18.21.1 specifications, ensuring consistent quality and interchangeability across applications
• Enhanced Safety & Reliability - Generous 0.153-0.213" thickness range offers optimal strength and stability for critical fastening applications
• Environmental Responsibility - Full RoHS 3 and REACH compliance ensures safe usage while meeting global environmental regulations
• Versatile Industrial Application - USS designation confirms suitability for heavy machinery, construction, and structural applications requiring reliable fastening solutions

Professional Applications & Engineering Value

This USS flat washer delivers exceptional engineering value through its steel construction and precise dimensional control. The substantial 3.5" outer diameter provides maximum bearing surface, effectively distributing clamp load across a wider area to prevent material crushing and joint failure in heavy-duty industrial applications. Engineered specifically for 1 1/2" screw sizes with a precise 1.625" inner diameter, this flat washer eliminates play and ensures proper alignment during assembly. The robust steel material withstands vibration, thermal cycling, and mechanical stress common in construction equipment, structural steel connections, and industrial machinery. With thickness variations between 0.153-0.213", these washers accommodate different compression requirements while maintaining structural integrity under extreme loading conditions.

Specification Summary & Compliance

This USS flat washer features precise dimensional specifications with 1.625" inner diameter, 3.5" outer diameter, and thickness ranging from 0.153" to 0.213". Manufactured in compliance with ASME B18.21.1 standards for dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance for restricted substances and REACH (EC 1907/2006) compliance with current SVHC requirements as of June 14, 2023. Designed specifically for use with 1 1/2" screw sizes in inch measurement system applications.