S-91117A229 0.562" ID x 3" OD Oversized Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with a large 3" outer diameter and precise thickness range (0.235-0.265") to prevent surface damage and fastener loosening under high stress
• Superior corrosion resistance provided by zinc-plated steel coating, extending service life in demanding industrial environments
• Enhanced durability with Rockwell B40 hardness rating, ensuring consistent performance and resistance to deformation
• Perfect compatibility with 1/2" screw sizes and inch measurement system, simplifying inventory and installation processes
• Reliable compliance with RoHS 3 and REACH regulations, making it suitable for global industrial applications without environmental concerns
• Cost-effective maintenance through reduced wear on connected components, lowering long-term operational costs

Professional Applications & Engineering Value

This zinc-plated steel flat washer is engineered to address common industrial fastening challenges, such as uneven load distribution and corrosion-induced failures. The 3" OD and controlled thickness (0.235-0.265") ensure optimal surface contact, minimizing stress concentration and preventing joint failure in heavy-duty applications like construction machinery, structural assemblies, and automotive systems. Made from zinc-plated steel, it offers excellent protection against rust and chemical exposure, while the Rockwell B40 hardness guarantees structural integrity under repetitive loads. Ideal for use with 1/2" screw sizes in inch-based systems, this washer provides reliable performance in environments requiring precise load distribution and long-term fastener stability.

Specification Summary & Compliance

This flat washer features a 0.562" ID and 3" OD with a thickness range of 0.235-0.265", manufactured to standard inch system tolerances for consistent fit. It complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as an alloying element in steel and is REACH (EC 1907/2006) compliant, meeting current SVHC requirements as of 01/17/2023. The Rockwell B40 hardness ensures mechanical reliability, supporting applications that demand precise engineering and regulatory adherence.