S-98019A228 0.28" ID x 0.375" OD MS51496-P84 Mil. Spec. Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance thanks to passivated 18-8 stainless steel, ideal for harsh industrial environments.
• Precise dimensional fit with 0.375" OD and 0.28" ID, ensuring reliable performance for 1/4" screws.
• Enhanced load distribution and reduced surface pressure with consistent 0.022-0.028" thickness.
• Durable mechanical strength backed by Rockwell C20 hardness, resisting deformation under stress.
• Guaranteed compliance with MS51496-P84 specifications, meeting rigorous aerospace and military standards.
• Environmental safety assurance through RoHS 3 and REACH compliance, supporting sustainable operations.
• Broad compatibility with inch-system fasteners, simplifying sourcing and assembly in North American markets.

Professional Applications & Engineering Value

These passivated 18-8 stainless steel flat washers deliver exceptional reliability in demanding applications where corrosion and mechanical failure are critical concerns. The precise OD and ID dimensions (0.375" x 0.28") ensure a perfect fit for 1/4" screws, preventing loosening and distributing loads evenly across surfaces. With a Rockwell C20 hardness, they maintain structural integrity under vibration and torque, making them ideal for machinery, automotive, and electrical enclosures. The passivation surface treatment enhances the innate corrosion resistance of stainless steel, extending service life in humid or chemically aggressive settings. Certified to MS51496-P84, these washers meet stringent quality controls, providing engineers with a trusted component for critical assemblies that demand long-term performance and regulatory adherence.

Specification Summary & Compliance

This flat washer adheres to exact dimensional tolerances with an OD of 0.375", ID of 0.28", and thickness range of 0.022-0.028", designed for use with 1/4" screws in inch-based systems. It conforms to the MS51496-P84 specification, ensuring consistent manufacturing quality. The washer is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming the absence of hazardous substances and supporting environmental and workplace safety standards.