S-94744A293 0.531" ID x 1.75" 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 demanding environments
• Optimal load distribution with 1.75" outer diameter, preventing surface damage and maintaining joint integrity
• Precision fit for 1/2" screws with 0.531" inner diameter, ensuring secure fastening and reducing installation errors
• Enhanced durability with Rockwell B40 hardness, resisting deformation under heavy loads and repeated use
• Industry-standard compliance with ASME B18.21.1, guaranteeing dimensional accuracy and reliable performance
• Environmental responsibility through RoHS 3 and REACH compliance, meeting strict regulatory requirements
• Consistent thickness control (0.090-0.112") for uniform pressure application and improved assembly stability

Professional Applications & Engineering Value

This zinc-plated steel flat washer delivers critical engineering solutions for industrial applications where corrosion resistance and load distribution are paramount. The inch-system dimensions (0.531" ID x 1.75" OD) provide precise compatibility with 1/2" screws, while the zinc plating creates a protective barrier against rust and chemical exposure in harsh environments like construction, machinery assembly, and outdoor infrastructure. Engineered to ASME B18.21.1 standards, it prevents bolt loosening, reduces stress concentration, and maintains clamping force integrity under vibration and thermal cycling. The Rockwell B40 hardness ensures the washer retains its shape under extreme pressure, making it ideal for heavy-duty fastening systems requiring long-term reliability and minimal maintenance.

Specification Summary & Compliance

This flat washer maintains precise dimensional tolerances per ASME B18.21.1 specifications, with inner diameter of 0.531", outer diameter of 1.75", and thickness ranging 0.090-0.112". Manufactured from zinc-plated steel with Rockwell B40 hardness, it is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel alloys and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are met for global industrial applications.