S-98019A390 0.375" ID x 0.875" OD MS15795-813; NASM15795 Mil. Spec. Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction for extended service life in harsh environments
• Precise dimensional fit with 0.375" ID and 0.875" OD ensuring optimal load distribution for 5/16" screw applications
• Enhanced durability with Rockwell B70 hardness rating providing reliable performance under heavy loads
• Military-grade compliance meeting MS15795-813 and NASM15795 specifications for critical industrial applications
• Consistent thickness control between 0.064-0.104" for uniform pressure distribution and joint integrity
• Environmental compliance with RoHS 3 and REACH regulations for safe, sustainable industrial use
• Reliable performance in inch system applications with precision manufacturing for consistent quality

Professional Applications & Engineering Value

This passivated 18-8 stainless steel flat washer delivers exceptional engineering value in demanding industrial environments where corrosion resistance and dimensional precision are critical. The 18-8 stainless steel composition combined with passivation surface treatment provides superior protection against oxidation and chemical degradation, making it ideal for marine, chemical processing, and outdoor applications. Engineered to MS15795-813 and NASM15795 specifications, this heavy-duty washer maintains joint integrity under vibration and thermal cycling, preventing loosening in 5/16" screw assemblies. The precise 0.375" ID and 0.875" OD dimensions ensure optimal load distribution, reducing stress concentrations and extending the service life of connected components in machinery, structural frameworks, and precision equipment.

Specification Summary & Compliance

This precision flat washer features exact dimensional tolerances with 0.375" inner diameter, 0.875" outer diameter, and thickness ranging 0.064-0.104" for consistent performance in inch system applications. Manufactured to meet MS15795-813 and NASM15795 military specifications with Rockwell B70 hardness rating, ensuring mechanical reliability. The washer is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, confirming its suitability for global industrial markets with stringent chemical substance restrictions.