S-95630A559 4.3 mm ID x 8 mm OD Plastic Washers

Key Features & Benefits at a Glance

• Extreme temperature resilience for reliable performance from -50°F to 500°F in demanding thermal environments
• Superior chemical resistance due to PTFE material composition, ideal for corrosive or aggressive media applications
• Excellent electrical insulation properties providing reliable non-conductive performance in electrical assemblies
• Consistent dimensional accuracy with precise 4.3mm ID and 8mm OD for perfect M4 screw compatibility
• Optimized mechanical durability with Durometer 51D hardness for long-lasting performance under compression
• Regulatory compliance assurance with RoHS 3 (2015/863/EU) certification for environmental and safety standards
• Minimal friction surface offering excellent anti-stick properties and reduced wear on mating surfaces

Professional Applications & Engineering Value

This PTFE plastic flat washer delivers exceptional engineering value in applications where conventional metal washers fail. The M4 metric configuration with precise 4.3mm internal diameter ensures perfect fitment for standard M4 screw applications, while the white PTFE material provides inherent chemical inertness that resists virtually all industrial chemicals and solvents. In high-temperature environments reaching 500°F, this washer maintains structural integrity where plastic alternatives would degrade, and at -50°F minimum temperature, it remains flexible where metals become brittle. The combination of electrical insulation and chemical resistance makes this flat washer ideal for electrical enclosures, chemical processing equipment, food machinery, and semiconductor manufacturing where contamination or conductivity must be avoided.

Specification Summary & Compliance

This metric flat washer features precise dimensional specifications with 4.3mm internal diameter, 8mm outer diameter, and 0.4-0.6mm thickness range, engineered for Class 2A tolerance fit with M4 screws. Manufactured from premium PTFE plastic with Durometer 51D hardness rating, the washer complies with RoHS 3 (2015/863/EU) environmental standards and is suitable for applications requiring REACH compliance. The product meets industry standards for flat washers in metric sizing and is manufactured under quality systems ensuring consistent performance across production batches.