S-90375A130 0.384" ID x 0.694" OD ASME B18.21.1 External-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with external teeth that bite into mating surfaces, preventing loosening under dynamic loads
• Exceptional corrosion resistance from 316 stainless steel construction, ideal for harsh industrial and marine environments
• Precise dimensional fit with 0.384" ID and 0.694" OD ensuring proper alignment and distribution of clamping force for 3/8" screws
• Reliable locking performance through controlled thickness (0.032-0.040") maintaining consistent spring tension and seating pressure
• Industry-standard compliance with ASME B18.21.1 specifications guaranteeing interchangeability and engineering reliability
• Environmental regulatory compliance meeting RoHS 3 and REACH standards for safe use in regulated applications
• Durable heavy-duty construction providing repeated use capability without deformation or loss of locking effectiveness

Professional Applications & Engineering Value

These 316 stainless steel external tooth lock washers deliver critical vibration-resistant fastening solutions where equipment reliability is paramount. The external tooth configuration creates multiple biting points that dig into both the fastener head and base material, effectively resisting rotational loosening caused by machinery vibrations, thermal cycling, and dynamic loading conditions. Manufactured from premium 316 stainless steel, these washers offer superior corrosion resistance compared to standard stainless grades, making them ideal for chemical processing, marine equipment, food processing machinery, and outdoor industrial applications. The ASME B18.21.1 compliance ensures dimensional precision and performance consistency, while the RoHS 3 and REACH compliance addresses environmental regulations for global manufacturing operations.

Specification Summary & Compliance

This external tooth lock washer features precise inch-system dimensions with 0.384" internal diameter, 0.694" outer diameter, and controlled thickness between 0.032-0.040" for optimal performance with 3/8" fasteners. Manufactured in compliance with ASME B18.21.1 standards for tooth lock washers, ensuring dimensional accuracy and mechanical properties. The product meets RoHS 3 (2015/863/EU) compliance and REACH (EC 1907/2006) compliance with current substance restrictions, making it suitable for regulated industrial applications requiring environmental responsibility.