S-98026A129 3.125" ID x 5.5" OD General Purpose Washers

Key Features & Benefits at a Glance

• Exceptional load distribution with 3.125" ID and 5.5" OD, preventing surface damage and loosening under high stress.
• Superior corrosion resistance from zinc yellow-chromate plating, ideal for harsh industrial or outdoor environments.
• High-strength performance with Grade 8 classification and Rockwell C38 hardness, ensuring reliability in heavy-duty applications.
• Precise fit for 3" screws, reducing assembly time and improving fastener system integrity.
• Durable material construction using plated steel, offering long service life and reduced maintenance costs.
• Compliance with environmental standards including REACH, ensuring safe and sustainable usage.
• Consistent thickness range (0.249-0.327") for uniform pressure distribution and stable joint connections.

Professional Applications & Engineering Value

This USS flat washer is engineered to address common industrial challenges such as joint failure, corrosion, and uneven load distribution. Made from zinc yellow-chromate plated steel, it provides excellent protection against rust and chemical exposure, making it suitable for demanding sectors like construction, machinery, and infrastructure. The Grade 8 strength and precise dimensions ensure secure fastening for 3" screw applications, minimizing vibration-induced loosening and extending equipment lifespan. Its robust design supports heavy loads and high-torque environments, delivering reliable performance while reducing downtime and replacement frequency.

Specification Summary & Compliance

This washer meets USS standards with an inner diameter of 3.125", outer diameter of 5.5", and thickness ranging from 0.249" to 0.327". It is manufactured to Grade 8 specifications with a hardness of Rockwell C38, ensuring dimensional accuracy and mechanical integrity. The product is REACH (EC 1907/2006) compliant as of June 14, 2023, confirming adherence to environmental and safety regulations without SVHC concerns.