S-91114A035 0.641" ID x 1.07" 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 to prevent loosening under dynamic loads
• Enhanced corrosion protection through zinc-plated steel construction for extended service life in demanding environments
• Consistent locking performance maintained by Rockwell C40 hardness ensuring teeth retain their shape and grip
• Precise dimensional compatibility with 0.641" ID and 1.07" OD designed specifically for 5/8" fasteners
• Reliable industrial compliance meeting ASME B18.21.1 standards for quality assurance and interchangeability
• Environmental responsibility with RoHS 3 and REACH compliance for safe use in regulated applications
• Optimized thickness range (0.042-0.050") providing proper spring tension while accommodating surface variations

Professional Applications & Engineering Value

This 5/8" external tooth lock washer delivers critical vibration-resistant performance in demanding mechanical systems where fastener security is paramount. The zinc-plated steel construction provides essential corrosion resistance while the precisely formed external teeth create multiple biting points that dig into both the fastener and workpiece surfaces. This design effectively prevents rotational loosening caused by machinery vibration, thermal cycling, or dynamic loading conditions. The Rockwell C40 hardness ensures the teeth maintain their aggressive locking action through repeated stress cycles without deformation. Particularly valuable in heavy machinery, automotive assemblies, and industrial equipment, this ASME B18.21.1 compliant washer offers engineers a reliable solution for critical joints where failure is not an option.

Specification Summary & Compliance

Manufactured to ASME B18.21.1 dimensional standards with internal diameter of 0.641" and external diameter of 1.07" specifically engineered for 5/8" fasteners. The controlled thickness range of 0.042-0.050" ensures consistent performance across production batches. This external tooth lock washer features inch system measurements and complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications with strict material restrictions.