S-91114A031 0.384" ID x 0.694" OD ASME B18.21.1 External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through external tooth design that bites into mating surfaces, preventing fastener loosening in high-stress applications
• Enhanced corrosion protection with zinc-plated steel construction, ensuring long-term durability in industrial environments
• Optimal hardness performance with Rockwell C40 rating, maintaining tooth integrity under repeated loading cycles
• Precision dimensional fit with 0.384" ID and 0.694" OD, providing exact compatibility with 3/8" fasteners
• Industry-standard compliance meeting ASME B18.21.1 specifications for reliable mechanical performance
• Environmental regulation adherence with RoHS 3 and REACH compliance, suitable for global manufacturing requirements
• Consistent thickness control between 0.032-0.040" ensuring uniform clamping force distribution

Professional Applications & Engineering Value

This 3/8" external tooth lock washer delivers critical vibration-resistant performance for demanding industrial applications where fastener security is paramount. The zinc-plated steel construction provides essential corrosion resistance while the precisely engineered external tooth location creates maximum bite force against both the fastener head and mating surface. This design effectively solves common engineering challenges in heavy machinery, automotive assemblies, and structural frameworks where constant vibration and dynamic loads compromise traditional fastening methods. The Rockwell C40 hardness ensures teeth maintain their gripping capability through multiple installation cycles, while the ASME B18.21.1 compliance guarantees dimensional accuracy and mechanical reliability. These industrial lock washers are particularly valuable in applications requiring frequent maintenance or exposure to thermal cycling, where consistent clamping force must be maintained despite environmental stresses.

Specification Summary & Compliance

This precision external tooth lock washer features dimensional specifications of 0.384" inner diameter, 0.694" outer diameter, and thickness ranging 0.032-0.040" for optimal 3/8" fastener compatibility. Manufactured to ASME B18.21.1 standards for mechanical performance and dimensional accuracy, the washer maintains Rockwell C40 hardness for consistent tooth engagement. The product fully complies with RoHS 3 (2015/863/EU) environmental directives and REACH (EC 1907/2006) regulations regarding substance restrictions, making it suitable for international industrial applications with strict environmental compliance requirements.