S-91150A126 0.64" ID x 1.134" OD ASME B18.21.1 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal teeth that bite into mating surfaces to prevent loosening under dynamic loads
• Exceptional durability with Rockwell C44 hardness maintaining tooth integrity through repeated assembly cycles
• Reliable corrosion protection through zinc-plated steel construction for extended service life in harsh environments
• Heavy-duty performance meeting Grade 8 standards for high-strength applications requiring maximum fastener security
• Precision dimensional control with 0.64" ID and 1.134" OD ensuring proper fit for 5/8" fasteners
• Industry-standard compliance with ASME B18.21.1 specifications guaranteeing consistent quality and performance
• Environmental responsibility through RoHS 3 and REACH compliance for safe use in regulated industries

Professional Applications & Engineering Value

These Grade 8 tooth lock washers deliver critical vibration resistance in demanding industrial applications where fastener security is paramount. The internal tooth design creates multiple biting points that dig into both the fastener and workpiece, effectively resisting rotational forces and maintaining clamp load in high-vibration environments. Manufactured from zinc-plated steel, these washers provide essential corrosion protection while the Rockwell C44 hardness ensures teeth maintain their locking capability through repeated torque cycles. Ideal for heavy machinery, automotive assemblies, and structural applications, these ASME B18.21.1 compliant washers offer engineers a reliable solution to prevent costly downtime caused by fastener failure in critical connections.

Specification Summary & Compliance

This 5/8" tooth lock washer features precise dimensional specifications with 0.64" internal diameter, 1.134" outer diameter, and thickness ranging from 0.054" to 0.070". Manufactured to ASME B18.21.1 standards with Grade 8 strength classification and Rockwell C44 hardness. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across various industrial sectors while meeting international quality and safety requirements.