S-96551A340 0.089" ID x 0.2" OD ASME B18.21.1; MS35333-103; NASM35333 Mil. Spec. Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance through internal tooth design that bites into mating surfaces, preventing fastener loosening under dynamic loads
• Excellent corrosion resistance from bronze construction, ideal for harsh environments and marine applications
• Exceptional durability with Rockwell B90 hardness, maintaining locking performance through repeated assembly cycles
• Precision dimensional control with 0.089" ID and 0.2" OD ensuring perfect fit for No. 2 screw applications
• Multi-standard compliance meeting ASME B18.21.1, MS35333-103, and NASM35333 specifications for reliable performance
• Consistent thickness tolerance (0.010-0.015") providing uniform clamping force and reliable seating
• Optimal material selection using bronze for excellent conductivity and non-sparking properties in electrical and hazardous environments

Professional Applications & Engineering Value

These bronze tooth lock washers deliver critical engineering solutions where vibration-induced fastener failure poses significant operational risks. The internal tooth configuration creates multiple biting points that dig into both the fastener head and base material, creating mechanical interference that resists rotational forces. This design is particularly valuable in aerospace applications requiring MS35333-103 and NASM35333 compliance, marine equipment benefiting from bronze's corrosion resistance, and electrical assemblies where the material's conductivity prevents galvanic corrosion. The Rockwell B90 hardness ensures teeth maintain their biting capability without deformation, while the precise 0.089" ID provides secure seating on No. 2 screws without compromising thread engagement. This combination addresses the fundamental challenge of maintaining joint integrity in high-vibration industrial environments.

Specification Summary & Compliance

This bronze tooth lock washer features dimensional precision with internal diameter of 0.089" and external diameter of 0.2", manufactured to exacting thickness tolerances between 0.010-0.015". The component fully complies with ASME B18.21.1 standards for tooth lock washers, along with military specifications MS35333-103 and aerospace standard NASM35333. The internal tooth location and Rockwell B90 hardness ensure consistent performance across demanding applications, while the bronze material composition meets industry requirements for corrosion resistance and durability in challenging operating conditions.