S-92150A216 0.127" ID x 0.297" OD MS51859-2 Mil. Spec. Plastic Washers

Key Features & Benefits at a Glance

• Excellent corrosion resistance ensures long-term reliability in humid or chemically exposed environments without rust or degradation
• Wide temperature tolerance maintains structural integrity and performance in applications up to 180°F
• Precise dimensional fit with 0.127" ID and 0.297" OD provides secure seating and uniform load distribution for No. 4 screws
• Non-conductive nylon construction prevents electrical conductivity, making it ideal for electrical insulation applications
• REACH compliance guarantees environmental safety and regulatory adherence for international industrial use
• MS51859-2 specification compliance ensures consistent quality and interchangeability in military and aerospace applications
• Lightweight plastic material reduces overall assembly weight while providing durable, long-lasting performance

Professional Applications & Engineering Value

This nylon flat washer delivers critical engineering solutions where metal fasteners fail. The white nylon plastic construction provides inherent corrosion resistance, eliminating galvanic corrosion risks when used with dissimilar metals and making it perfect for marine, chemical processing, and outdoor applications. Its non-conductive properties make it essential for electrical assemblies, electronic enclosures, and equipment requiring electrical isolation. The precise 0.127" ID and 0.297" OD dimensions ensure perfect fitment with No. 4 screws, preventing loosening from vibration while distributing load evenly across surfaces. Meeting MS51859-2 specifications, this washer maintains dimensional stability across its 180°F temperature range, providing reliable performance in automotive, aerospace, and industrial equipment where thermal cycling occurs.

Specification Summary & Compliance

This flat washer features precise inch system dimensions with 0.127" inner diameter, 0.297" outer diameter, and thickness ranging from 0.031" to 0.049". Manufactured to meet MS51859-2 military specifications for dimensional accuracy and performance requirements. The product is fully REACH compliant (EC 1907/2006) as of 06/14/2023, containing no substances of very high concern among the 235 SVHCs. Designed specifically for No. 4 screw size applications with temperature resistance up to 180°F maximum operating temperature.