S-98029A058 1.063" ID x 2.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from black-oxide steel construction, extending service life in harsh industrial environments
• Precise dimensional fit with 1.063" ID ensuring secure seating on 1" screw shafts without play or misalignment
• Optimal load distribution through generous 2.5" OD, preventing surface damage and maintaining joint integrity
• Heavy-duty performance with robust 0.293-0.318" thickness for high-stress applications requiring reliable bearing surfaces
• Environmental compliance assurance meeting RoHS 3 and REACH standards for global supply chain integration
• Interchangeable compatibility with inch-system fasteners, simplifying maintenance and replacement procedures
• Consistent thickness tolerance providing uniform clamping force across assembly surfaces

Professional Applications & Engineering Value

This black-oxide steel flat washer delivers critical engineering solutions for industrial equipment assembly, construction frameworks, and heavy machinery maintenance. The black-oxide surface treatment creates a protective barrier against oxidation and chemical exposure, significantly outperforming untreated steel in humid or corrosive environments. With its precise 1.063" inner diameter matching standard 1" screw sizes, it eliminates bolt hole misalignment while the substantial 2.5" outer diameter distributes clamping forces effectively across soft materials or painted surfaces. These industrial washers prevent fastener embedding, reduce friction-induced wear, and maintain torque integrity in vibrating systems—making them indispensable for structural steel connections, conveyor systems, and outdoor infrastructure projects where corrosion resistance and dimensional stability are paramount.

Specification Summary & Compliance

Manufactured to standard inch system dimensions with 1.063" ID and 2.5" OD maintaining Class 2A fit tolerances. The 0.293-0.318" thickness range ensures consistent performance across production batches. Compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead alloying elements in steel and fully REACH (EC 1907/2006) compliant per the latest SVHC list (01/17/2023). Material specifications follow industrial standards for black-oxide steel flat washers in heavy-duty applications.