S-98029A116 1.5" ID x 2.75" OD Oversized Washers

Key Features & Benefits at a Glance

• Enhanced corrosion resistance from the black-oxide steel finish, extending service life in demanding industrial environments.
• Optimal load distribution with a large 2.75" outer diameter, minimizing surface pressure and preventing material damage.
• Precise compatibility for 1 3/8" screw sizes, ensuring a secure and reliable fit in your assembly.
• Robust construction with a thickness of 0.240-0.260", providing structural integrity under heavy loads.
• Environmental compliance with RoHS 3 and REACH regulations, meeting global standards for safe industrial use.
• Dimensional accuracy in inch measurements, guaranteeing consistent performance in mechanical applications.
• Versatile application in heavy-duty machinery and equipment, thanks to durable steel material and flat washer design.

Professional Applications & Engineering Value

This black-oxide steel flat washer is engineered to address common industrial challenges such as fastener loosening, surface wear, and corrosion. The black-oxide surface treatment provides a protective layer that significantly reduces oxidation, making it ideal for outdoor or high-moisture settings like construction, agricultural machinery, and automotive assemblies. Its generous 2.75" OD and 1.5" ID ensure even pressure distribution across joints, preventing stress concentration on soft materials and enhancing the longevity of 1 3/8" screw connections. By combining durability with precise inch system dimensions, this washer minimizes maintenance needs and supports reliable performance in heavy-duty applications, from structural frameworks to industrial equipment.

Specification Summary & Compliance

This flat washer features standard inch dimensions with an inner diameter of 1.5", outer diameter of 2.75", and thickness ranging from 0.240" to 0.260", designed for use with 1 3/8" screws. It complies with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel alloys and is REACH (EC 1907/2006) compliant, ensuring adherence to environmental and safety regulations for industrial components. The product meets general manufacturing specifications for flat washers, providing consistent quality and reliability in various mechanical setups.