S-96551A370 0.168" ID x 0.34" OD ASME B18.21.1; MS35333-106; NASM35333 Mil. Spec. Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance with internal teeth that bite into mating surfaces to prevent fastener loosening under dynamic loads
• Excellent corrosion resistance due to bronze construction, ideal for harsh industrial environments and marine applications
• Optimized for No. 8 screw applications with precise 0.168" ID and 0.34" OD dimensions ensuring perfect fit and consistent performance
• Enhanced durability with Rockwell B90 hardness rating that maintains tooth integrity through repeated installation cycles
• Reliable compliance meeting ASME B18.21.1, MS35333-106, and NASM35333 standards for guaranteed quality and interchangeability
• Secure locking action from internal tooth design that provides maximum surface contact and prevents rotational slippage
• Consistent thickness control (0.018-0.023") ensuring uniform clamping force and proper fastener tensioning

Professional Applications & Engineering Value

These bronze internal tooth lock washers deliver critical vibration-resistant fastening solutions for demanding industrial applications. The bronze material provides natural corrosion resistance while maintaining excellent electrical conductivity, making these washers ideal for electrical panels, marine equipment, and chemical processing machinery where galvanic corrosion is a concern. The precision-engineered internal tooth configuration creates multiple biting points that dig into both the fastener head and mounting surface, effectively solving common vibration-induced loosening problems in machinery, automotive assemblies, and aerospace components. Meeting ASME B18.21.1 and military specifications MS35333-106 and NASM35333, these washers ensure reliable performance in critical fastening joints subjected to thermal cycling and mechanical stress.

Specification Summary & Compliance

This bronze tooth lock washer features inch system dimensions with 0.168" internal diameter and 0.34" outer diameter, specifically engineered for No. 8 screw applications. The washer maintains precise thickness tolerances between 0.018-0.023" and achieves Rockwell B90 hardness for optimal performance. Manufactured in full compliance with ASME B18.21.1 dimensional standards and military specifications MS35333-106 and NASM35333, ensuring consistent quality and reliable performance in industrial fastening systems. The internal tooth location provides superior locking action while the bronze composition offers natural corrosion resistance without additional plating requirements.