S-98970A141 1.375" ID x 3" OD ASME B18.21.1 USS Washers

Key Features & Benefits at a Glance

• Superior corrosion protection through hot-dipped galvanized steel construction, extending service life in harsh environments
• Optimal load distribution with 3" outer diameter, preventing surface damage and maintaining joint integrity
• Precise fit for 1 1/4" screws with 1.375" inner diameter, ensuring secure fastening and vibration resistance
• Enhanced mechanical stability from 0.136-0.192" thickness range, providing reliable performance under heavy loads
• Industry-standard compliance with ASME B18.21.1 specifications, guaranteeing consistent quality and interchangeability
• Environmental responsibility with RoHS 3 compliance, meeting strict regulatory requirements for hazardous substances
• Durable zinc coating that withstands mechanical abrasion while maintaining corrosion resistance

Professional Applications & Engineering Value

These USS flat washers deliver critical engineering solutions where corrosion resistance and structural integrity are paramount. The hot-dipped galvanized steel construction provides a thick, bonded zinc coating that offers superior protection against rust and environmental degradation, making them ideal for outdoor construction, marine applications, and industrial equipment exposed to moisture. The generous 3" outer diameter distributes clamping force effectively across wider surfaces, preventing material deformation in soft substrates while the precise 1.375" ID ensures proper alignment with 1 1/4" screw sizes. Engineered to ASME B18.21.1 standards, these washers maintain dimensional consistency for reliable performance in heavy-load scenarios, from structural steel connections to machinery assembly where vibration resistance is critical.

Specification Summary & Compliance

This USS flat washer features dimensional specifications of 1.375" inner diameter, 3" outer diameter, and thickness ranging from 0.136" to 0.192", designed specifically for use with 1 1/4" screw sizes. Manufactured in compliance with ASME B18.21.1 standard for dimensional requirements and quality assurance. The product meets RoHS 3 (2015/863/EU) compliance standards, ensuring environmental responsibility through restricted hazardous substance content. The hot-dipped galvanized steel construction provides both corrosion protection and mechanical durability for demanding industrial applications.