S-91117A210 0.281" ID x 1.5" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance through zinc-plated steel construction, extending service life in harsh industrial environments
• Exceptional load distribution with large 1.5" outer diameter, preventing surface damage and maintaining joint integrity
• Precise fit for 1/4" fasteners with 0.281" inner diameter, ensuring secure installation and reduced vibration loosening
• Enhanced durability with Rockwell B40 hardness rating, providing reliable performance under heavy mechanical stress
• Regulatory compliance assurance meeting RoHS 3 and REACH standards, suitable for global supply chains and sensitive applications
• Consistent thickness control (0.235-0.250") for uniform pressure distribution and predictable clamping force
• Heavy-duty construction designed to withstand extreme conditions in industrial machinery and structural applications

Professional Applications & Engineering Value

This zinc-plated steel flat washer delivers critical engineering solutions for industrial applications where corrosion resistance and load distribution are paramount. The heavy-duty construction with precise 0.281" ID ensures perfect compatibility with 1/4" fasteners, eliminating play and reducing stress concentration points. The substantial 1.5" OD provides exceptional surface coverage, protecting sensitive materials from damage while distributing clamping forces evenly. The zinc plating creates a protective barrier against moisture and chemical exposure, making these industrial washers ideal for outdoor equipment, machinery assemblies, and structural applications where environmental factors threaten fastener integrity. The combination of Rockwell B40 hardness and controlled thickness ensures reliable performance in high-vibration environments common in manufacturing and construction sectors.

Specification Summary & Compliance

Manufactured to inch system standards with precise dimensional tolerances: 0.281" inner diameter, 1.5" outer diameter, and thickness ranging 0.235-0.250". The zinc-plated steel construction meets Rockwell B40 hardness specifications for consistent mechanical properties. Full compliance with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel, and REACH (EC 1907/2006) compliance with the latest SVHC list (01/17/2023, 233 substances), ensuring regulatory acceptance for international industrial applications.