S-98025A031 0.406" ID x 0.812" OD Oversized Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with zinc yellow-chromate plating, extending service life in harsh industrial environments
• Exceptional load distribution thanks to precise 0.406" ID and 0.812" OD dimensions, preventing surface damage and loosening
• High-strength performance backed by Grade 8 classification and Rockwell C43 hardness for demanding applications
• Reliable dimensional stability with controlled thickness (0.110-0.126") ensuring consistent clamping force
• Compliance assurance with RoHS 3 and REACH regulations, meeting global environmental and safety standards
• Optimized for 3/8" fasteners in inch measurement systems, ensuring seamless integration with existing assemblies
• Enhanced durability from plated steel construction, resisting wear and deformation under high stress

Professional Applications & Engineering Value

This Grade 8 flat washer is engineered to address critical challenges in heavy machinery, construction, and automotive sectors where vibration, corrosion, and high tensile loads compromise fastener integrity. The zinc yellow-chromate plated steel material provides a robust barrier against rust and chemical exposure, significantly reducing maintenance downtime. With its precise 0.406" ID and 0.812" OD, it ensures even pressure distribution, preventing bolt head embedding and joint failure. The Rockwell C43 hardness and Grade 8 strength make it ideal for bolted connections in structural frameworks, engine components, and industrial equipment, delivering long-term reliability under cyclic loading and extreme conditions.

Specification Summary & Compliance

This flat washer adheres to inch system standards with an inner diameter of 0.406", outer diameter of 0.812", and thickness ranging from 0.110" to 0.126", designed specifically for 3/8" screw sizes. It conforms to Grade 8 fastener strength requirements and features a hardness of Rockwell C43 for consistent performance. The product is fully compliant with RoHS 3 (2015/863/EU) under exemption 6(a) for lead as a steel alloying element and REACH (EC 1907/2006) regulations, ensuring environmental and safety adherence for industrial supply chains.