S-93012A124 1.625" ID x 3" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance from hot-dipped galvanized steel coating, ensuring long-term reliability in harsh industrial environments.
• Superior load distribution with a 3" OD and 1.625" ID, effectively preventing surface damage and loosening of 1 1/2" screws under heavy loads.
• High mechanical strength with Rockwell B72 hardness, providing consistent performance and resistance to deformation in demanding applications.
• Precise dimensional compliance with ASME B18.21.1 standards, guaranteeing interchangeability and reliable fit in inch-system assemblies.
• Enhanced durability from robust material and controlled thickness (0.136-0.192"), reducing maintenance frequency and replacement costs.
• Environmental and safety compliance with RoHS 3 regulations, making it suitable for global supply chains and regulated industries.
• Optimized for heavy-duty use in construction, machinery, and structural applications where reliable fastening is critical.

Professional Applications & Engineering Value

This SAE flat washer is engineered to address common industrial challenges such as corrosion-induced failure and uneven load distribution. The hot-dipped galvanized steel construction provides a thick, adherent zinc coating that significantly extends service life in outdoor or high-moisture settings, reducing downtime and replacement expenses. With its large outer diameter (3") and precise inner diameter (1.625"), it effectively spreads clamping force over a wider area, preventing joint relaxation and surface indentation on softer materials. Ideal for structural bolting, heavy machinery assembly, and infrastructure projects, this washer ensures consistent performance under vibration and dynamic loads. Compliance with ASME B18.21.1 ensures dimensional accuracy and reliability, making it a trusted component for engineers and procurement specialists seeking durable, standards-compliant fastening solutions.

Specification Summary & Compliance

This washer meets ASME B18.21.1 dimensional and mechanical requirements, with an inner diameter of 1.625", outer diameter of 3", and thickness ranging from 0.136" to 0.192". It is manufactured from hot-dipped galvanized steel with a hardness of Rockwell B72, ensuring consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) regulations, confirming the absence of restricted hazardous substances, and is designed for use with 1 1/2" screws in inch-system applications.