S-95481A031 0.143" ID x 0.438" OD Finishing Washers

Key Features & Benefits at a Glance

• Superior corrosion resistance with nylon construction, eliminating rust and galvanic corrosion in harsh environments
• Precise flush mounting ensured by the 82° countersink angle for seamless integration with No. 6 screw heads
• Excellent mechanical durability provided by Rockwell R120 hardness, maintaining shape under load
• Broad temperature compatibility from -40°F to 180°F for reliable performance in extreme conditions
• Accurate dimensional fit with 0.143" ID and 0.438" OD for secure fastening without slippage
• Environmental compliance assurance with RoHS 3 certification for regulated industry applications
• Lightweight electrical insulation properties ideal for electronic assemblies and weight-sensitive applications

Professional Applications & Engineering Value

These nylon countersunk washers deliver critical engineering solutions where metal fasteners fail. The 82° countersink angle creates perfect flush surfaces in aerospace panels, electronic enclosures, and automotive trim, preventing snagging while distributing load evenly. Nylon plastic construction provides inherent corrosion resistance, eliminating galvanic reactions between dissimilar metals and making these plastic washers ideal for marine, chemical processing, and outdoor applications. With Rockwell R120 hardness maintaining dimensional stability and the wide temperature range ensuring performance from arctic conditions to industrial heat, these RoHS 3 compliant washers meet the stringent requirements of medical devices, food processing equipment, and consumer electronics where material safety and reliability are paramount.

Specification Summary & Compliance

This countersunk washer features precision inch dimensions with 0.143" internal diameter and 0.438" outer diameter, specifically engineered for No. 6 screws. The 82° countersink angle conforms to standard aviation and industrial specifications. Manufactured from nylon plastic with Rockwell R120 hardness rating, these washers maintain consistent performance across the specified -40°F to 180°F operational range. The product is fully RoHS 3 (2015/863/EU) compliant, meeting international restrictions on hazardous substances for global manufacturing applications.