S-98019A217 0.125" ID x 0.255" OD MS51496-P66 Mil. Spec. Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with passivated 18-8 stainless steel construction, ideal for harsh industrial environments
• Exceptional load distribution from precise 0.125" ID and 0.255" OD dimensions, preventing surface damage and fastener loosening
• Consistent performance under pressure thanks to Rockwell C20 hardness, maintaining structural integrity in demanding applications
• Guaranteed dimensional accuracy through compliance with MS51496-P66 specifications, ensuring perfect fit for No. 4 screws
• Long-term reliability with material properties that resist wear, reducing maintenance frequency and replacement costs
• Environmental compliance assurance meeting RoHS 3 and REACH standards, suitable for regulated industries
• Optimized for industrial assembly providing secure fastening solutions where vibration resistance and durability are critical

Professional Applications & Engineering Value

These passivated 18-8 stainless steel flat washers deliver critical engineering solutions where corrosion resistance and dimensional precision are paramount. The 0.125" ID x 0.255" OD configuration ensures optimal load distribution for No. 4 screw applications, preventing surface indentation and maintaining joint integrity in vibrating machinery, electrical enclosures, and marine equipment. The Rockwell C20 hardness provides sufficient toughness to withstand repeated torque cycles without deformation, while the passivated surface treatment creates an additional protective layer against chemical exposure and atmospheric corrosion. Engineered to MS51496-P66 specifications, these washers eliminate compatibility issues in military, aerospace, and industrial assemblies where fastener failure is not an option.

Specification Summary & Compliance

This flat washer maintains dimensional precision with inner diameter of 0.125", outer diameter of 0.255", and thickness range of 0.013-0.019". Manufactured from 18-8 stainless steel with passivated finish and hardened to Rockwell C20, it conforms to MS51496-P66 military specifications. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental safety and regulatory acceptance across global markets.