S-96551A170 0.769" ID x 1.245" OD ASME B18.21.1; MS35333-81; NASM35333 Mil. Spec. Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through internal tooth design that bites into mating surfaces, preventing loosening under dynamic loads
• Exceptional corrosion resistance with 410 stainless steel construction, ideal for harsh industrial environments
• High-strength performance with Rockwell C40-50 hardness rating, ensuring durability under heavy-duty applications
• Precise dimensional compatibility with 3/4" fasteners (0.769" ID, 1.245" OD) for reliable fit and secure fastening
• Industry-standard compliance with ASME B18.21.1, MS35333-81, and NASM35333 specifications for guaranteed quality
• Environmental responsibility through RoHS 3 and REACH compliance, meeting strict regulatory requirements
• Optimized thickness range (0.047-0.055") providing consistent performance while accommodating manufacturing tolerances

Professional Applications & Engineering Value

This 410 stainless steel tooth lock washer delivers critical engineering value in applications where vibration-induced loosening compromises safety and performance. The internal tooth location creates multiple biting points that dig into both the fastener and surface, maintaining clamp load in high-vibration environments like heavy machinery, automotive assemblies, and industrial equipment. Manufactured to inch system precision with controlled Rockwell C40-50 hardness, this washer provides consistent spring tension while resisting deformation under load. The corrosion-resistant properties of 410 stainless steel ensure long-term reliability in demanding conditions, making it an essential component for maintenance-critical applications where fastener security cannot be compromised.

Specification Summary & Compliance

This tooth lock washer features precise dimensional specifications including 0.769" ID, 1.245" OD, and thickness range of 0.047-0.055" for 3/4" screw compatibility. Manufactured in accordance with ASME B18.21.1, MS35333-81, and NASM35333 standards, ensuring consistent quality and performance. The washer meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) environmental regulations, confirming its suitability for regulated industries and global supply chains.