S-94744A225 0.203" ID x 0.406" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance through zinc plating for extended service life in harsh industrial environments
• Precise dimensional fit with 0.203" ID and 0.406" OD ensuring perfect alignment with No. 10 screws
• Superior load distribution with controlled thickness (0.036-0.045") to prevent surface damage and fastener loosening
• Reliable hardness performance rated at Rockwell B40 for consistent durability under mechanical stress
• Industry-standard compliance with ASME B18.21.1 specifications for guaranteed interchangeability and quality
• Environmental regulation adherence meeting RoHS 3 and REACH requirements for safe global sourcing
• Robust steel construction providing excellent strength-to-weight ratio for heavy-duty applications

Professional Applications & Engineering Value

These zinc-plated steel flat washers deliver critical engineering solutions by preventing fastener loosening from vibration and distributing clamp load across wider surfaces. The inch-system dimensions (0.203" ID × 0.406" OD) ensure precise compatibility with No. 10 screws in assembly operations, while the Rockwell B40 hardness maintains structural integrity under repeated torque cycles. The zinc plating creates a sacrificial barrier against oxidation, making these ASME B18.21.1 compliant washers ideal for electrical enclosures, machinery frames, and outdoor equipment where moisture resistance is paramount. Their controlled thickness variation guarantees consistent performance in automated production environments.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 dimensional standards with inch-system precision. The zinc-plated steel construction meets Rockwell B40 hardness requirements for mechanical reliability. Fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) and REACH (EC 1907/2006) regulations (233 SVHC as of 01/17/2023), ensuring environmental responsibility and global market acceptance.