S-91117A249 0.938" ID x 3.25" OD Oversized Washers

Key Features & Benefits at a Glance

• Enhanced Corrosion Resistance: Zinc-plated steel construction provides reliable protection against rust and environmental degradation, extending service life in harsh industrial settings.
• Optimal Load Distribution: Large 3.25" outer diameter and 0.938" inner diameter ensure even pressure distribution, reducing surface damage and loosening under heavy loads.
• Precision Fit for 7/8" Screws: Accurately sized to fit standard 7/8" fasteners, minimizing misalignment and ensuring secure assembly in mechanical applications.
• Superior Durability: Rockwell B40 hardness rating offers excellent resistance to deformation, maintaining structural integrity under repeated stress.
• Consistent Thickness Control: Thickness range of 0.360-0.390" guarantees uniform performance and reliable sealing in high-vibration environments.
• Compliance with Global Standards: Meets RoHS 3 and REACH regulations, ensuring safe use in regulated industries without hazardous substances.
• Heavy-Duty Construction: Inch-system design and robust steel material make it ideal for demanding applications requiring long-term reliability.

Professional Applications & Engineering Value

This heavy-duty flat washer is engineered to address common industrial challenges such as fastener loosening, surface wear, and corrosion. The zinc-plated steel material, combined with precise dimensions (0.938" ID x 3.25" OD), ensures a secure fit for 7/8" screws in mechanical assemblies, construction equipment, and automotive systems. Its Rockwell B40 hardness prevents deformation under high loads, while the zinc coating offers superior corrosion resistance, reducing maintenance needs in outdoor or humid environments. Ideal for industrial washers applications, it enhances joint integrity and prolongs equipment lifespan by distributing stress evenly and resisting environmental degradation.

Specification Summary & Compliance

This flat washer adheres to inch system measurements with an inner diameter of 0.938", outer diameter of 3.25", and thickness ranging from 0.360" to 0.390". It is designed for use with 7/8" screws and features a Rockwell B40 hardness for consistent performance. The product complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel alloys and is REACH (EC 1907/2006) compliant, meeting current substance restrictions for industrial safety.