S-98119A112 1.875" ID x 3.375" OD ASTM F436 Type 1 Structural Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with hot-dipped galvanized steel coating, ideal for outdoor and harsh industrial environments
• Exceptional load distribution due to large 3.375" OD and 1.875" ID, preventing surface damage and joint loosening
• High hardness durability with Rockwell C38 rating, maintaining structural integrity under heavy loads and vibration
• Precision compatibility with 1 3/4" screw sizes, ensuring secure fastening and reduced installation time
• Regulatory compliance assurance meeting ASTM F436 Type 1 standards for consistent performance in structural applications
• Environmental safety with RoHS 3 and REACH compliance, eliminating hazardous substance concerns in regulated industries
• Thickness tolerance control (0.178-0.280") providing reliable spacing and consistent clamping force in assembled structures

Professional Applications & Engineering Value

This heavy-duty flat washer delivers critical engineering solutions where corrosion and structural integrity are paramount. The hot-dipped galvanized steel construction creates a sacrificial zinc barrier that actively fights rust in chemical processing, marine, and construction applications. With its ASTM F436 Type 1 certification, it provides guaranteed hardness and dimensional stability for structural bolting in bridges, heavy equipment, and steel frameworks. The precise 1.875" ID and 3.375" OD dimensions ensure optimal load distribution, preventing embedment into soft materials and maintaining bolt tension in vibrating machinery. Engineers specify these industrial washers for permanent installations where disassembly isn't anticipated, leveraging the thick zinc coating for decades of maintenance-free service life.

Specification Summary & Compliance

This flat washer maintains dimensional accuracy per ASTM F436 Type 1 specifications with internal diameter of 1.875", outer diameter of 3.375", and thickness range of 0.178-0.280". The Rockwell C38 hardness ensures consistent performance in structural applications. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming absence of restricted substances. Designed specifically for use with 1 3/4" screw sizes in inch measurement system applications.