S-91225A313 8.4 mm ID x 15.8 mm OD Plastic Washers

Key Features & Benefits at a Glance

• Exceptional heat resistance up to 250°F (121°C), ensuring reliable performance in high-temperature environments without deformation or loss of mechanical properties.
• Superior hardness rating of Rockwell M105 provides excellent durability and resistance to wear, extending the washer's service life in demanding applications.
• Phenolic plastic construction offers outstanding chemical resistance, protecting against corrosion and degradation from oils, solvents, and other industrial chemicals.
• Precise metric sizing with 8.4mm ID and 15.8mm OD ensures perfect fit for M8 screws, preventing loosening and distributing load evenly.
• Thermal and electrical insulation properties make it ideal for applications where metal washers could cause short circuits or heat transfer issues.
• Compliance with RoHS 3 and REACH regulations guarantees environmental safety and unrestricted use in regulated industries and international markets.
• Consistent thickness between 1.4-1.7mm provides reliable sealing and spacing performance in assembled components.

Professional Applications & Engineering Value

This M8 phenolic plastic flat washer delivers critical engineering solutions where thermal stability and chemical resistance are paramount. The phenolic plastic material maintains structural integrity at elevated temperatures up to 250°F, preventing the softening and deformation common with standard plastic washers. This makes it ideal for electrical equipment, automotive assemblies, and industrial machinery where heat buildup occurs. The washer's non-conductive properties eliminate electrical bridging risks in electronic applications, while its chemical-resistant composition withstands exposure to lubricants, fuels, and cleaning agents without degradation. For engineers specifying components for high-temperature environments or corrosive conditions, this metric flat washer provides a reliable, maintenance-free solution that outperforms conventional materials.

Specification Summary & Compliance

This flat washer features precise metric dimensions with 8.4mm inner diameter and 15.8mm outer diameter, specifically designed for M8 screw applications. The thickness ranges from 1.4-1.7mm, ensuring consistent performance. Manufactured from phenolic plastic with Rockwell M105 hardness, it meets industry standards for mechanical applications. The product is fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant with current substance restrictions, making it suitable for global distribution and use in regulated industries requiring environmental compliance.