S-98019A233 0.421" ID x 0.63" OD MS51496-P85 Mil. Spec. Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance from passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Precise dimensional fit with 0.421" ID and 0.63" OD ensuring reliable performance with 3/8" screws
• Enhanced load distribution through controlled thickness (0.045-0.055") for improved joint integrity
• Exceptional durability with Rockwell C20 hardness maintaining structural integrity under repeated stress
• Military-grade compliance meeting MS51496-P85 specifications for critical applications
• Environmental responsibility with full RoHS 3 and REACH compliance for global supply chain compatibility
• Reduced maintenance cycles through corrosion-resistant properties extending service life

Professional Applications & Engineering Value

This passivated 18-8 stainless steel flat washer delivers critical engineering advantages in demanding environments where corrosion resistance and dimensional precision are paramount. The 0.421" ID provides exact compatibility with 3/8" screws, while the 0.63" OD ensures optimal load distribution across fastened surfaces. The Rockwell C20 hardness maintains structural integrity under vibration and thermal cycling, making it ideal for industrial machinery, marine equipment, and chemical processing applications. The passivation surface treatment creates a protective oxide layer that significantly enhances corrosion resistance compared to untreated stainless steel, addressing common failure points in harsh operating conditions while maintaining compliance with stringent military and industrial standards.

Specification Summary & Compliance

Manufactured to exact inch system dimensions with precise internal diameter (0.421"), outer diameter (0.63"), and thickness range (0.045-0.055"). Complies with MS51496-P85 military specification for material quality and performance requirements. Meets RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental compliance standards, ensuring suitability for global industrial applications and regulatory requirements.