S-98119A111 1.625" ID x 3" OD ASTM F436 Type 1; ASME B18.21.1 Structural Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from hot-dipped galvanized steel coating, ensuring long-term reliability in harsh environments.
• Exceptional load distribution with a large 3" outer diameter, minimizing surface pressure and preventing material damage.
• Precise fit for 1 1/2" screws with a 1.625" inner diameter, reducing installation time and improving assembly accuracy.
• High mechanical strength backed by Rockwell C38 hardness, providing consistent performance under heavy loads.
• Compliance with industry standards including ASTM F436 Type 1 and ASME B18.21.1, ensuring reliability in critical applications.
• Environmental and safety adherence with RoHS 3 and REACH compliance, supporting sustainable and safe industrial operations.
• Durable construction with a thickness range of 0.136-0.177", offering resilience against wear and deformation.

Professional Applications & Engineering Value

This hot-dipped galvanized steel flat washer is engineered to address common industrial challenges such as fastener loosening, corrosion-induced failures, and uneven load distribution. The zinc coating provides a robust barrier against moisture and chemicals, making it ideal for outdoor structures, marine equipment, and chemical processing plants where corrosion resistance is critical. Its large OD and precise ID ensure optimal force dispersion and secure fastening for 1 1/2" screws, reducing the risk of joint failure in heavy machinery, construction frameworks, and transportation infrastructure. By meeting ASTM F436 Type 1 and ASME B18.21.1 specifications, it delivers consistent performance in high-stress environments, enhancing the longevity and safety of industrial assemblies.

Specification Summary & Compliance

This flat washer features an inner diameter of 1.625", outer diameter of 3", and thickness ranging from 0.136" to 0.177", designed for use with 1 1/2" screw sizes. It conforms to ASTM F436 Type 1 and ASME B18.21.1 standards, ensuring dimensional accuracy and mechanical properties for reliable performance. The washer is manufactured from hot-dipped galvanized steel with a hardness of Rockwell C38 and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, supporting environmental and health safety in industrial applications.