S-98019A221 0.156" ID x 0.284" OD MS51496-P68 Mil. Spec. Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh environments and extended service life
• Precise dimensional accuracy (0.156" ID, 0.284" OD) ensures perfect fit and uniform load distribution for No. 6 screws
• Enhanced durability from Rockwell C20 hardness, providing reliable performance under mechanical stress and repeated use
• Compliance with MS51496-P68 specifications guarantees consistent quality and interchangeability in military and industrial applications
• Environmental safety assurance through RoHS 3 and REACH compliance, meeting strict regulatory standards for hazardous substances
• Optimized thickness range (0.013-0.019") allows for flexibility in assembly while maintaining structural integrity
• Broad industrial compatibility due to inch system measurement, suitable for North American machinery and equipment standards

Professional Applications & Engineering Value

These passivated 18-8 stainless steel flat washers address critical engineering challenges in corrosive and high-stress environments. The passivation surface treatment significantly enhances the natural corrosion resistance of stainless steel, preventing rust and degradation in applications exposed to moisture, chemicals, or outdoor conditions. With a Rockwell C20 hardness, they provide excellent resistance to deformation, ensuring consistent clamping force and vibration resistance in assemblies using No. 6 screw sizes. This makes them indispensable for industrial machinery, automotive components, electrical enclosures, and marine equipment, where failure due to washer corrosion or wear can lead to costly downtime and safety hazards. Their precise 0.156" ID and 0.284" OD dimensions prevent misalignment and distribute loads evenly, protecting sensitive surfaces and extending the life of the entire fastened joint.

Specification Summary & Compliance

This flat washer is manufactured to meet MS51496-P68 specifications, ensuring dimensional consistency and performance reliability. Key dimensions include an Inside Diameter of 0.156", Outside Diameter of 0.284", and a Thickness range of 0.013-0.019", designed for use with No. 6 screw sizes in inch-based systems. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, confirming it is free from restricted hazardous substances and safe for industrial and export use.