S-91717A138 9 mm ID x 28 mm OD Clipped Washers

Key Features & Benefits at a Glance

• Enhanced Load Distribution with 28mm outer diameter to prevent surface damage and maintain joint integrity under high stress
• Secure Anti-Rotation Performance thanks to the 23.3mm clipped design that locks firmly against flat surfaces and bolt heads
• Corrosion-Resistant Steel Construction with Rockwell B55 hardness for long-term durability in demanding industrial environments
• Precision M8 Compatibility with 9mm inner diameter ensuring perfect fit and vibration resistance in metric fastener assemblies
• Optimized Thickness Range (1.4-1.8mm) providing consistent spacing and tension control without adding unnecessary bulk
• Full Regulatory Compliance meeting RoHS 3 and REACH standards for safe use in global manufacturing and electronics applications
• Versatile Industrial Application suitable for machinery, automotive, and structural assemblies requiring reliable, heavy-duty fastening solutions

Professional Applications & Engineering Value

This M8 metric steel clipped washer delivers critical engineering advantages in industrial fastening systems where vibration loosening and surface protection are primary concerns. The clipped design with 23.3mm width provides positive locking against rotation, eliminating the need for additional locking components while maintaining consistent load distribution across the 28mm diameter. Manufactured from hardened steel with Rockwell B55 rating, this washer maintains dimensional stability under repeated stress cycles and offers inherent corrosion resistance for extended service life. The precise 9mm inner diameter ensures perfect alignment with M8 threaded fasteners, preventing cross-threading and reducing installation time in automated assembly processes. Ideal for heavy machinery, automotive subassemblies, and structural steel connections, this component addresses common failure points while meeting stringent environmental compliance requirements.

Specification Summary & Compliance

This precision M8 metric clipped washer features exact dimensional specifications including 9mm inner diameter, 28mm outer diameter, and 1.4-1.8mm thickness range with 23.3mm clipped width. Manufactured to metric system standards with consistent dimensional accuracy for reliable performance in industrial applications. The component is fully compliant with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) standards, ensuring environmental safety and unrestricted use in global manufacturing operations. The steel construction with Rockwell B55 hardness provides mechanical strength and durability meeting industrial fastener requirements for heavy-duty applications.