S-95795A020 0.256" ID x 0.76" OD ASME B18.21.1 Internal / External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal/external teeth design that bites into both mating surfaces for maximum locking security
• Enhanced corrosion protection through zinc plating, extending service life in demanding industrial environments
• Exceptional hardness rating of Rockwell C40 ensures teeth maintain their gripping capability under repeated stress cycles
• Precise dimensional compatibility with 1/4" screws (0.256" ID) for reliable installation and optimal performance
• Industry-standard compliance with ASME B18.21.1 specifications guarantees consistent quality and interchangeability
• Environmental regulation adherence with RoHS 3 and REACH compliance for safe use across global markets
• Dual-direction locking action from internal and external teeth provides redundant security against rotational loosening

Professional Applications & Engineering Value

These zinc-plated steel tooth lock washers deliver critical vibration resistance in demanding applications where fastener security is paramount. The unique internal/external tooth configuration creates multiple biting points that penetrate both the fastener and mating surface, effectively preventing rotational loosening caused by machinery vibration, thermal cycling, or dynamic loads. Engineered to ASME B18.21.1 standards, these washers maintain consistent performance in heavy machinery, automotive assemblies, construction equipment, and industrial manufacturing where 1/4" screw applications require reliable locking solutions. The Rockwell C40 hardness ensures the teeth resist deformation under high clamp loads, while the zinc plating provides essential corrosion protection in challenging environments.

Specification Summary & Compliance

This tooth lock washer features precise dimensional specifications with 0.256" inner diameter, 0.76" outer diameter, and 0.033-0.037" thickness range. Manufactured to ASME B18.21.1 standards for consistent performance and interchangeability. The product is fully compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, ensuring safe use across international markets. Designed specifically for 1/4" screw applications with internal/external tooth configuration for maximum locking effectiveness.