S-94744A285 0.531" ID x 1" OD ASME B18.21.1 ASME Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc plating that protects against rust and extends service life in demanding industrial environments
• Excellent load distribution from the precise 1" OD and 0.531" ID, preventing surface damage and maintaining joint integrity under heavy loads
• Reliable hardness performance with Rockwell B40 rating ensuring consistent durability and resistance to deformation during tightening
• Industry-standard compliance with ASME B18.21.1 specifications guaranteeing dimensional accuracy and interchangeability
• Environmental regulation adherence through RoHS 3 and REACH compliance, making them suitable for global supply chains and regulated industries
• Optimized for 1/2" fasteners with perfect fitment that reduces installation time and prevents loosening in critical assemblies
• Robust steel construction providing high tensile strength and long-term reliability in mechanical and structural applications

Professional Applications & Engineering Value

These zinc-plated steel flat washers deliver critical engineering solutions where corrosion resistance and load distribution are paramount. The Rockwell B40 hardness ensures they withstand high clamping forces without deforming, while the precise 0.531" ID and 1" OD dimensions provide optimal surface coverage for 1/2" screws. This combination prevents joint failure, reduces maintenance frequency, and extends equipment lifespan in industrial applications including machinery assembly, structural steel connections, and heavy equipment manufacturing. The ASME B18.21.1 compliance guarantees dimensional consistency across batches, eliminating fitment issues in production environments and reducing assembly errors.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 standards with dimensional specifications including 0.531" inner diameter, 1" outer diameter, and 0.056-0.071" thickness range. The zinc-plated steel construction meets Rockwell B40 hardness requirements for consistent performance. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and fully REACH (EC 1907/2006) compliant with 233 SVHC substances addressed as of 01/17/2023, ensuring regulatory adherence for international industrial applications.