S-91113A006 0.129" ID x 0.28" 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 durability and corrosion resistance thanks to the zinc-plated steel construction, ideal for harsh industrial environments.
• Reliable hardness performance with Rockwell C44 rating, ensuring the washer maintains its shape and locking force under pressure.
• Precise fit for No. 5 screws with 0.129" ID and 0.28" OD, providing secure fastening without slippage.
• Compliance with ASME B18.21.1 standards guarantees consistent quality and interchangeability in professional applications.
• Environmental and safety assurance through RoHS 3 and REACH compliance, meeting global regulatory requirements.
• Optimized thickness range (0.014-0.020") allows for slight variations while maintaining effective locking performance.

Professional Applications & Engineering Value

This tooth lock washer is engineered to address common issues like fastener loosening due to vibrations in machinery, automotive, and electrical assemblies. Made from zinc-plated steel, it offers excellent corrosion resistance, extending service life in demanding conditions. The internal tooth design ensures maximum grip by embedding into surfaces, providing reliable secure fastening for No. 5 screw applications. Ideal for industries requiring consistent performance, this washer reduces maintenance needs and enhances safety in industrial washers systems, supporting long-term operational efficiency.

Specification Summary & Compliance

This washer features precise dimensions: 0.129" ID, 0.28" OD, and thickness of 0.014-0.020", designed for No. 5 screw sizes. It conforms to ASME B18.21.1 standards for dimensional accuracy and performance. Additionally, it is compliant with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006), ensuring it meets environmental and safety regulations for industrial use.