S-96551A610 0.141" ID x 0.295" OD ASME B18.21.1; MS35333-71; NASM35333 Mil. Spec. Internal-Tooth Lock Washers

Key Features & Benefits at a Glance

• Superior vibration resistance from internal teeth that bite into mating surfaces, preventing screw loosening under dynamic loads
• Exceptional corrosion resistance with 410 stainless steel construction, ideal for harsh industrial environments
• Precision dimensional control (ID: 0.141", OD: 0.295") ensures perfect fit for No. 6 screws and consistent performance
• Enhanced durability with Rockwell C40-50 hardness rating for long service life under high-stress conditions
• Multi-standard compliance meeting ASME B18.21.1, MS35333-71, and NASM35333 specifications for guaranteed quality
• Environmental responsibility with RoHS 3 and REACH compliance, safe for regulated applications
• Optimized thickness range (0.017-0.021") provides reliable spring action while maintaining space efficiency

Professional Applications & Engineering Value

This 410 stainless steel internal tooth lock washer delivers critical vibration-resistant performance for demanding industrial applications. The strategically positioned internal teeth create maximum biting action into both the screw head and mounting surface, effectively resisting rotational forces in high-vibration environments like machinery, automotive assemblies, and electrical enclosures. Manufactured from 410 stainless steel with Rockwell C40-50 hardness, these washers maintain their locking force through thermal cycling and corrosive exposure. The precision inch dimensions ensure perfect compatibility with No. 6 screws, making them ideal for aerospace, military, and heavy equipment applications where fastener security is non-negotiable. This engineering solution prevents costly maintenance downtime and equipment failure caused by loose fasteners.

Specification Summary & Compliance

This tooth lock washer features precision inch dimensions (ID: 0.141", OD: 0.295", Thickness: 0.017-0.021") specifically engineered for No. 6 screws. Manufactured to exacting ASME B18.21.1, MS35333-71, and NASM35333 standards, ensuring consistent quality and performance. The washer demonstrates full compliance with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) environmental regulations, making it suitable for global industrial applications with strict material restrictions.