S-98119A114 2.657" ID x 4.5" OD ASTM F436 Type 1 Structural Washers

Key Features & Benefits at a Glance

• Superior corrosion protection with hot-dipped galvanized steel coating, extending service life in harsh industrial environments
• Exceptional load distribution from the large 4.5" OD and 0.240-0.340" thickness range, preventing surface damage and joint failure
• Precise compatibility with 2 1/2" screws thanks to the exact 2.657" ID, ensuring secure fastening and vibration resistance
• Guaranteed mechanical performance through ASTM F436 Type 1 certification and Rockwell C38 hardness for consistent strength
• Environmental compliance assurance with RoHS 3 and REACH standards, meeting global regulatory requirements
• Reduced maintenance needs due to the durable material and coating, lowering long-term operational costs
• Reliable dimensional stability in inch system measurements, facilitating easy integration into existing assemblies

Professional Applications & Engineering Value

Engineered for demanding industrial settings, these ASTM F436 Type 1 flat washers address critical challenges in heavy machinery, structural steel connections, and infrastructure projects. The hot-dipped galvanized steel construction provides a robust barrier against moisture, chemicals, and atmospheric corrosion, significantly reducing the risk of fastener degradation in outdoor or high-humidity environments. With a Rockwell C38 hardness and optimized dimensions (2.657" ID, 4.5" OD), they effectively distribute clamping forces over wider areas, preventing bolt loosening under dynamic loads and minimizing surface indentation on soft materials. This makes them ideal for 2 1/2" screw applications in construction, transportation equipment, and industrial assembly lines where vibration resistance and long-term reliability are paramount.

Specification Summary & Compliance

This flat washer meets precise dimensional tolerances with 2.657" inner diameter, 4.5" outer diameter, and 0.240-0.340" thickness range. Manufactured in accordance with ASTM F436 Type 1 specifications for mechanical properties and hardness (Rockwell C38). Fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental standards, ensuring safe use across regulated industries.