S-92844A173 1.313" ID x 3.5" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance in harsh environments due to 316 stainless steel construction, ideal for marine, chemical, and outdoor applications.
• Exceptional durability and load distribution provided by the large 3.5" outer diameter and substantial 0.234-0.266" thickness, reducing surface pressure and preventing joint failure.
• Precise fit for 1 1/4" screws with a 1.313" inner diameter, ensuring secure fastening and minimizing the risk of loosening under vibration.
• Guaranteed dimensional consistency and performance reliability through compliance with the ASME B18.21.1 standard.
• Environmental and safety compliance with RoHS 3 and REACH regulations, making them suitable for regulated industries and sustainable procurement.
• Long-term cost efficiency by resisting rust and degradation, which lowers maintenance frequency and replacement costs.
• Versatile industrial application across machinery, construction, and processing equipment where inch-system fasteners are specified.

Professional Applications & Engineering Value

Engineered for demanding conditions, these 316 stainless steel flat washers address critical challenges in industrial settings where moisture, chemicals, and stress are prevalent. The high corrosion resistance of 316-grade material prevents premature failure in marine, chemical processing, and wastewater treatment applications, ensuring long-term structural integrity. With a large outer diameter (3.5") and controlled thickness (0.234-0.266"), they effectively distribute clamping force over a wider area, protecting soft surfaces and reducing the risk of bolt pull-through. Designed for use with 1 1/4" screws in inch-system assemblies, these washers provide a reliable interface in heavy machinery, structural steel connections, and large-scale fabrication projects, enhancing safety and operational uptime.

Specification Summary & Compliance

This washer features an inner diameter of 1.313", outer diameter of 3.5", and thickness range of 0.234-0.266", suitable for 1 1/4" screw size applications. Manufactured to ASME B18.21.1 specifications, ensuring dimensional accuracy and mechanical performance. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming the absence of restricted hazardous substances and supporting sustainable industrial practices.