S-94744A164 0.156" ID x 0.438" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance through zinc plating, extending service life in demanding industrial environments
• Superior load distribution with precise 0.156" ID and 0.438" OD dimensions, preventing surface damage and loosening
• Consistent performance backed by Rockwell B40 hardness, maintaining structural integrity under pressure
• Reliable compatibility with No. 6 screws, ensuring secure fastening in assembly applications
• Industry-standard compliance with ASME B18.21.1, guaranteeing dimensional accuracy and interchangeability
• Environmental responsibility through RoHS 3 and REACH compliance, meeting global regulatory requirements
• Durable steel construction providing long-term reliability in heavy-duty mechanical applications

Professional Applications & Engineering Value

This zinc-plated steel flat washer delivers critical engineering solutions for industrial fastening systems. The combination of precision inch dimensions (0.156" ID x 0.438" OD) and Rockwell B40 hardness ensures optimal load distribution while preventing embedment and surface damage to connected components. The zinc plating provides essential corrosion protection, making these flat washers ideal for applications exposed to moisture or harsh environments. Engineered specifically for No. 6 screw size applications, these washers solve common assembly challenges by maintaining clamp force integrity and preventing fastener loosening under vibration. Their compliance with ASME B18.21.1 standards guarantees consistent performance across manufacturing, automotive, and machinery applications where reliable industrial washers are critical to operational safety and longevity.

Specification Summary & Compliance

This flat washer features precision inch dimensions with 0.156" internal diameter, 0.438" outer diameter, and thickness ranging 0.036-0.045". Manufactured to ASME B18.21.1 specifications for dimensional accuracy and performance. The zinc-plated steel construction provides Rockwell B40 hardness for consistent mechanical properties. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and REACH (EC 1907/2006) regulations, ensuring environmental responsibility in industrial applications.