S-91113A039 1.144" ID x 1.83" 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, preventing loosening under dynamic loads
• Enhanced corrosion protection through zinc plating, extending service life in demanding industrial environments
• Precision dimensional fit with 1.144" ID specifically engineered for secure 1 1/8" screw applications
• Exceptional hardness durability with Rockwell C44 rating maintaining tooth integrity under high clamping forces
• Reliable standards compliance meeting ASME B18.21.1 specifications for consistent performance and interchangeability
• Environmental regulation adherence with RoHS 3 and REACH compliance for global industrial applications
• Optimized load distribution through 1.83" OD design, reducing surface pressure and material deformation

Professional Applications & Engineering Value

These zinc-plated steel tooth lock washers deliver critical vibration-resistant fastening solutions for industrial machinery, heavy equipment, and structural assemblies where dynamic loads cause conventional fasteners to fail. The internal tooth configuration provides superior bite and locking action compared to standard washers, maintaining clamp load integrity in high-vibration environments like motors, engines, and power transmission systems. Manufactured from Rockwell C44 hardened steel, these washers resist deformation under extreme torque conditions while the zinc plating offers sacrificial corrosion protection. The precise 1.144" inner diameter ensures perfect compatibility with 1 1/8" fasteners, eliminating play and misalignment issues common in industrial maintenance and OEM applications.

Specification Summary & Compliance

This tooth lock washer features dimensional specifications of 1.144" inner diameter, 1.83" outer diameter, and thickness ranging 0.059-0.067" with internal tooth location design. Manufactured to ASME B18.21.1 standards for dimensional accuracy and performance reliability in inch system applications. Full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring suitability for global industrial markets and restricted substance requirements.