S-90718A210 8.4 mm ID x 17 mm OD UL 94 HB Plastic Washers

Key Features & Benefits at a Glance

• Superior dimensional stability with precise 8.4mm ID/17mm OD metric sizing ensures perfect fit and consistent performance in M8 screw assemblies
• Enhanced mechanical strength from glass-filled nylon construction provides excellent load distribution and resistance to deformation under pressure
• Exceptional chemical resistance makes these washers ideal for harsh industrial environments where corrosion or chemical exposure is a concern
• Reliable electrical insulation properties prevent current leakage and short circuits in electrical applications
• High-temperature endurance up to 220°F maintains structural integrity and performance in thermally demanding operations
• Flame retardant safety with UL 94 HB certification ensures reduced fire hazard risk in various industrial settings
• Regulatory compliance assurance with RoHS 3 and REACH adherence guarantees environmental safety and global market acceptance

Professional Applications & Engineering Value

Engineered for demanding industrial scenarios, these M8 metric flat washers deliver critical performance advantages where standard metal washers fail. The glass-filled nylon plastic construction provides inherent chemical resistance that prevents degradation from oils, solvents, and industrial chemicals, while offering excellent electrical insulation for electrical enclosures and control panels. The material's Rockwell M111 hardness ensures maintained clamping force without embedding into soft surfaces, solving common loosening issues in vibration-prone applications. With temperature resistance up to 220°F, these washers perform reliably in automotive, machinery, and outdoor equipment where thermal cycling occurs. The black color provides UV resistance for extended outdoor service life, making them ideal for solar installations, telecommunications equipment, and architectural applications requiring durable, non-conductive spacing solutions.

Specification Summary & Compliance

These metric flat washers feature precision dimensions of 8.4mm inner diameter and 17mm outer diameter, specifically designed for M8 screw applications. Manufactured to meet UL 94 HB flammability standards for plastic materials, they demonstrate slow burning characteristics on horizontal specimens. The products are fully RoHS 3 (2015/863/EU) compliant and REACH (EC 1907/2006) compliant with current SVHC requirements as of January 2023. The glass-filled nylon material provides consistent performance across the specified temperature range while maintaining dimensional stability and mechanical properties in various industrial environments.