S-94744A289 0.531" ID x 1.25" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc-plated steel construction, extending service life in harsh industrial environments
• Precise dimensional fit with 0.531" ID and 1.25" OD ensuring optimal load distribution for 1/2" screws
• Enhanced mechanical durability from Rockwell B40 hardness, maintaining structural integrity under heavy loads
• Reliable performance compliance with ASME B18.21.1 standards for consistent quality and interchangeability
• Environmental regulation adherence through RoHS 3 and REACH compliance, meeting global supply chain requirements
• Optimized thickness range (0.090-0.112") providing ideal compression characteristics for vibration resistance
• Seamless inch-system compatibility for straightforward integration with existing North American equipment and fasteners

Professional Applications & Engineering Value

This zinc-plated steel flat washer delivers critical engineering solutions for heavy-duty industrial applications where corrosion resistance and load distribution are paramount. The precision-engineered dimensions (0.531" ID x 1.25" OD) create an optimal bearing surface for 1/2" screws, preventing joint loosening under vibration and thermal cycling. The zinc plating provides sacrificial protection against oxidation in demanding environments including outdoor construction, machinery assembly, and structural steel connections. Manufactured to ASME B18.21.1 specifications, these flat washers ensure consistent performance in high-stress applications while the controlled thickness range maintains uniform clamping force across the fastened assembly.

Specification Summary & Compliance

This flat washer features inch-system dimensions with 0.531" internal diameter, 1.25" outer diameter, and thickness ranging 0.090-0.112" specifically designed for 1/2" screw applications. Manufactured in compliance with ASME B18.21.1 standards for dimensional accuracy and mechanical properties. The component demonstrates Rockwell B40 hardness for consistent performance and meets RoHS 3 (2015/863/EU) compliance with exemption 6(a) for lead as an alloying element in steel, along with full REACH (EC 1907/2006) compliance for hazardous substances restriction.