S-96345A186 2-56 MS17830-02C, MS21044C02, NASM17830, NASM21044 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through nylon insert locking technology that maintains secure fastening in high-motion applications
• Exceptional corrosion resistance with 18-8 stainless steel construction for long-term reliability in harsh environments
• Precision thread engagement with Class 3B thread fit ensuring consistent, reliable performance in critical assemblies
• High-temperature capability with nylon insert rated for continuous service up to 250°F (121°C)
• Industry-standard compliance meeting MS17830-02C, MS21044C02, NASM17830, and NASM21044 specifications for aerospace and industrial applications
• Easy installation and removal with standard external hex drive design compatible with common wrench tools
• Environmental compliance with REACH and RoHS 3 regulations for safe use in regulated industries

Professional Applications & Engineering Value

This 2-56 UNC thread nylon insert locknut delivers critical vibration resistance where traditional fasteners fail. The 18-8 stainless steel construction provides excellent corrosion resistance while the nylon insert creates consistent locking force without damaging threads. Engineered with Class 3B thread fit precision, this external hex locknut ensures reliable performance in aerospace assemblies, industrial machinery, electronic enclosures, and automotive applications where vibration loosening compromises safety. The coarse UNC threads facilitate quick installation while maintaining strength, making it ideal for production environments requiring both speed and reliability. With certification to multiple military and aerospace standards, this locknut meets the stringent requirements of professional engineering applications where failure is not an option.

Specification Summary & Compliance

This nylon insert locknut features 2-56 UNC coarse threads with Class 3B thread fit precision, 1/4" width across flats, and 9/64" height. Manufactured to exacting MS17830-02C, MS21044C02, NASM17830, and NASM21044 specifications with right-hand thread direction. Compliant with REACH (EC 1907/2006) and RoHS 3 (2015/863/EU) environmental regulations, ensuring safe use across global markets. The nylon insert maintains locking performance up to 250°F maximum temperature while the 18-8 stainless steel construction provides durable, corrosion-resistant service life.