S-95584A313 0.768" ID x 1.26" OD ASME B18.21.1 External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with external teeth that bite into mating surfaces, preventing loosening under dynamic loads
• Excellent corrosion resistance provided by 18-8 stainless steel construction for long service life in harsh environments
• Optimized hardness at Rockwell B88 ensures teeth maintain gripping force without deforming under pressure
• Precise dimensional compatibility with 3/4" fasteners (0.768" ID, 1.26" OD) for secure fit and uniform load distribution
• Industry-standard compliance with ASME B18.21.1 ensures consistent performance and interchangeability
• Environmental regulation adherence with RoHS 3 and REACH compliance for global manufacturing applications
• Reliable locking action through external tooth design that provides positive mechanical locking without damaging surfaces

Professional Applications & Engineering Value

This 18-8 stainless steel external tooth lock washer delivers critical vibration resistance in demanding industrial environments where mechanical fasteners are subjected to constant dynamic stresses. The external tooth configuration creates multiple biting points that dig into both the fastener head and base material, creating a mechanical interference that prevents rotational loosening - a common failure point in machinery, automotive assemblies, and heavy equipment. The Rockwell B88 hardness ensures the teeth maintain their aggressive profile without flattening, while the stainless steel material provides inherent corrosion resistance that eliminates galvanic compatibility concerns in mixed-material assemblies. Engineered to ASME B18.21.1 standards, these washers offer predictable performance in critical applications from pump systems to structural frameworks where vibration-induced fastener failure is not an option.

Specification Summary & Compliance

This washer features precise dimensional specifications including 0.768" inner diameter, 1.26" outer diameter, and thickness ranging 0.047-0.055" for consistent performance with 3/4" fasteners. Manufactured in compliance with ASME B18.21.1 standards for tooth lock washers, ensuring dimensional accuracy and mechanical properties. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, meeting the latest environmental and substance restriction requirements for industrial components.