S-91081A043 1.75" ID x 3.75" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Superior load distribution with 3.75" outer diameter to prevent surface damage and joint loosening under heavy loads
• Precise 1.75" inner diameter ensures perfect fit for 1 5/8" fasteners, eliminating installation issues
• Durable steel construction provides excellent mechanical strength and long-term reliability in demanding environments
• ASME B18.21.1 compliance guarantees consistent dimensional accuracy and interchangeability
• Enhanced corrosion resistance through material properties, extending service life in industrial settings
• RoHS 3 & REACH compliance ensures environmental safety and regulatory acceptance for global projects
• Optimal thickness range (0.153-0.213") maintains structural integrity while accommodating minor surface variations

Professional Applications & Engineering Value

This USS flat washer delivers critical engineering solutions for industrial applications where load distribution and fastener protection are paramount. The steel construction provides exceptional durability against deformation under high-pressure conditions, while the precise 1.75" ID and 3.75" OD dimensions ensure optimal surface contact area. These ASME B18.21.1 compliant washers effectively prevent bolt head and nut embedding in soft materials, reduce friction during tightening, and maintain clamping force in vibrating environments. Ideal for structural steel connections, heavy machinery assembly, and infrastructure projects, these industrial washers solve common issues of joint failure and material damage through their robust design and standardized dimensions.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 standards with inch system measurements: 1.75" inner diameter, 3.75" outer diameter, and thickness range of 0.153-0.213" for compatibility with 1 5/8" screw sizes. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations ensures environmental responsibility and unrestricted use in international markets. The steel material provides consistent performance without hardness rating requirements for general industrial applications.