S-98119A125 2.907" ID x 5" OD ASTM F436 Type 1 Structural Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with hot-dipped galvanized steel coating, ensuring long-term reliability in harsh industrial environments.
• Exceptional load distribution due to the large 5" OD and 0.240-0.340" thickness, minimizing surface damage and fastener loosening.
• High hardness rating of Rockwell C38 provides excellent wear resistance and maintains structural integrity under heavy loads.
• Precise compatibility with 2 3/4" screws, thanks to the accurate 2.907" ID, ensuring secure and stable fastening assemblies.
• Compliance with ASTM F436 Type 1 standards guarantees consistent quality, mechanical properties, and performance in structural applications.
• REACH compliance ensures safe use by adhering to environmental and health regulations, reducing risks in industrial settings.
• Durable construction from inch-system specifications offers reliable performance in demanding mechanical and construction projects.

Professional Applications & Engineering Value

This hot-dipped galvanized steel flat washer is engineered to address common industrial challenges, such as corrosion and structural fatigue. The heavy-duty design, with a 5" outer diameter and thickness range of 0.240-0.340", effectively distributes load and prevents embedding in soft materials, making it ideal for structural applications like bridge construction, machinery assembly, and heavy equipment. The ASTM F436 Type 1 certification ensures it meets rigorous standards for hardness and tensile strength, while the galvanized coating provides a robust barrier against moisture and chemicals. This washer simplifies maintenance and enhances safety in industrial washers systems, reducing downtime and replacement costs in corrosive environments.

Specification Summary & Compliance

This flat washer adheres to precise dimensional tolerances, with an inner diameter of 2.907" and outer diameter of 5", designed for use with 2 3/4" screws. It meets ASTM F436 Type 1 specifications for mechanical properties and is compliant with REACH (EC 1907/2006) regulations, ensuring no use of restricted substances. The hardness is rated at Rockwell C38, providing consistent performance in structural and industrial fastening applications.