S-91113A037 0.894" ID x 1.41" OD ASME B18.21.1 Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal tooth design that bites into mating surfaces to prevent loosening under extreme dynamic loads
• Enhanced corrosion protection through zinc-plated steel construction for extended service life in harsh industrial environments
• Maximum clamping force retention achieved through Rockwell C44 hardness rating ensuring consistent performance under high stress
• Precision dimensional compatibility with 0.894" ID and 1.41" OD designed specifically for 7/8" screw applications
• Industry-standard compliance with ASME B18.21.1 specifications guaranteeing reliable mechanical performance
• Environmental regulation adherence meeting RoHS 3 and REACH requirements for safe, sustainable industrial use
• Optimized thickness range (0.052-0.060") providing ideal compression characteristics without material deformation

Professional Applications & Engineering Value

This heavy-duty tooth lock washer addresses critical vibration-induced fastener failure in demanding industrial applications. The internal tooth location creates multiple biting points that dig into both the fastener and surface, maintaining clamping force even under severe shock and vibration conditions. Manufactured from zinc-plated steel, it provides essential corrosion resistance while the Rockwell C44 hardness ensures teeth maintain their bite without flattening under pressure. Ideal for heavy machinery, automotive assemblies, and structural applications where vibration resistance is paramount, this ASME B18.21.1 compliant washer delivers reliable performance in inch-system mechanical fastening where permanent loosening prevention is required.

Specification Summary & Compliance

This tooth lock washer features precise dimensional specifications including 0.894" internal diameter, 1.41" outer diameter, and thickness ranging 0.052-0.060" for optimal compression. Manufactured to ASME B18.21.1 standards for mechanical fasteners, it ensures consistent quality and performance. The product maintains full compliance with RoHS 3 (2015/863/EU) regulations and REACH (EC 1907/2006) requirements, including the latest SVHC updates. The internal tooth configuration provides superior locking action compared to standard washers, making it suitable for critical industrial applications where vibration resistance is essential.