S-94744A729 21.9 mm ID x 49.6 mm OD ASME B18.22M 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 accuracy with 21.9mm ID and 49.6mm OD ensuring perfect fit for M20 fasteners
• Enhanced load distribution with 3.5-4.6mm thickness range, preventing surface damage and loosening
• Guaranteed interchangeability through strict compliance with ASME B18.22M manufacturing standards
• Environmental responsibility with REACH SVHC compliance, meeting stringent EU chemical safety regulations
• Optimized for heavy-duty applications with robust steel material handling high-stress assembly requirements
• Simplified inventory management with standardized metric sizing for consistent industrial procurement

Professional Applications & Engineering Value

This M20 zinc-plated steel flat washer delivers critical engineering solutions for industrial assembly challenges. The zinc-plated surface treatment provides essential corrosion protection in manufacturing facilities, construction sites, and outdoor equipment where moisture exposure is common. With precise 21.9mm internal diameter and 49.6mm outer diameter, this metric flat washer ensures perfect alignment with M20 fasteners while the controlled thickness variation (3.5-4.6mm) maintains consistent clamping force distribution. Engineered to ASME B18.22M standards, these industrial washers prevent joint failure in heavy machinery, structural steel connections, and automotive assemblies by eliminating stress concentration points and maintaining bolt tension under vibration and dynamic loads.

Specification Summary & Compliance

This flat washer features dimensional specifications of 21.9mm ID × 49.6mm OD with thickness ranging 3.5-4.6mm, manufactured to ASME B18.22M standard for consistent quality and performance. The product maintains compliance with REACH (EC 1907/2006) regulations regarding SVHC substances (updated January 17, 2022, 223 substances). Constructed from zinc-plated steel, this M20-sized washer provides reliable performance in metric fastener systems while meeting industrial safety and environmental requirements.