S-98025A139 1.188" ID x 2.25" OD Oversized Washers

Key Features & Benefits at a Glance

• Exceptional corrosion resistance with zinc yellow-chromate plating, ideal for harsh industrial environments and extended service life.
• Superior load distribution due to the large 2.25" outer diameter, minimizing surface pressure and preventing material damage.
• High-strength Grade 8 classification ensures reliable performance in demanding, high-stress applications.
• Precise fit for 1 1/8" screws with a 1.188" inner diameter, providing secure fastening and reducing installation errors.
• Enhanced durability from Rockwell C43 hardness, offering excellent resistance to wear and deformation.
• Full regulatory compliance with RoHS 3 and REACH, ensuring safe use in regulated markets and eco-conscious projects.
• Robust material integrity from plated steel construction, combining strength with effective corrosion protection.

Professional Applications & Engineering Value

This Grade 8 flat washer is engineered to address critical challenges in heavy machinery, construction, and automotive assemblies where vibration, high loads, and environmental exposure are common. The zinc yellow-chromate plated steel provides a robust barrier against rust and chemical degradation, significantly extending the lifespan of the fastener system. Its precise dimensions (1.188" ID and 2.25" OD) ensure optimal load spreading, preventing bolt loosening and joint failure. The Rockwell C43 hardness guarantees that the washer maintains its shape under extreme pressure, making it a reliable component for industrial applications that demand corrosion resistance and unwavering fastener strength.

Specification Summary & Compliance

This washer conforms to standard inch system measurements with an inner diameter of 1.188", outer diameter of 2.25", and thickness ranging from 0.235" to 0.264", designed for use with 1 1/8" screw size. It meets the stringent requirements for Grade 8 fastener strength and is manufactured from plated steel with a hardness of Rockwell C43. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead in steel and REACH (EC 1907/2006) regulations, ensuring environmental and safety standards are upheld.