S-93012A123 1.5" ID x 2.75" OD ASME B18.21.1 SAE Washers

Key Features & Benefits at a Glance

• Superior corrosion protection with hot-dipped galvanized steel coating for extended service life in harsh environments
• Optimal load distribution with precise 1.5" ID and 2.75" OD dimensions to prevent surface damage and joint loosening
• Exceptional mechanical strength with Rockwell B72 hardness rating to withstand high-pressure applications
• Industry-standard compatibility with 1 3/8" screw sizes for seamless integration into existing assemblies
• Reliable performance assurance through compliance with ASME B18.21.1 manufacturing specifications
• Environmental responsibility with RoHS 3 compliance, free from hazardous substances
• Dimensional stability with thickness range of 0.136-0.192" for consistent performance under varying loads

Professional Applications & Engineering Value

These hot-dipped galvanized steel flat washers deliver critical engineering solutions for industrial applications where corrosion resistance and structural integrity are paramount. The thick zinc coating provides sacrificial protection against rust and chemical degradation, making them ideal for outdoor construction, marine equipment, and chemical processing facilities. Engineered to ASME B18.21.1 standards, these SAE washers maintain precise dimensional tolerances to prevent stress concentration and distribute loads evenly across fastened surfaces. The Rockwell B72 hardness ensures they maintain their structural integrity under heavy loads and vibration, while the inch system measurements guarantee compatibility with North American industrial equipment and 1 3/8" screw applications in heavy machinery, structural steel connections, and industrial maintenance operations.

Specification Summary & Compliance

This flat washer features precise dimensional specifications with 1.5" inner diameter, 2.75" outer diameter, and thickness ranging from 0.136" to 0.192". Manufactured from hot-dipped galvanized steel with Rockwell B72 hardness, the product strictly adheres to ASME B18.21.1 engineering standards for dimensional accuracy and performance requirements. Compliant with RoHS 3 (2015/863/EU) environmental directives, these washers meet international regulatory requirements while providing reliable performance in industrial fastening systems using the inch measurement system.