S-95154A180 1/2"-20 MS21044-N8 Locknuts

Key Features & Benefits at a Glance

• Superior vibration resistance through the precision-engineered nylon insert that maintains locking force under dynamic loads
• Reliable performance in high-temperature environments with a maximum operating temperature of 250°F (121°C)
• Enhanced corrosion protection provided by cadmium yellow-chromate plating on steel construction
• Precise thread engagement ensured by Class 3B thread fit for secure fastening in critical applications
• Easy installation and removal with standard 3/4" external hex drive design
• Optimal performance in fine thread applications with 1/2"-20 UNF right-hand threading
• Compliance with stringent aerospace standards through MS21044-N8 specification certification

Professional Applications & Engineering Value

This nylon insert locknut delivers exceptional engineering value in applications where vibration-induced loosening poses significant operational risks. The cadmium yellow-chromate plated steel construction provides dual protection against corrosion while maintaining dimensional stability. The fine thread UNF configuration with Class 3B fit ensures maximum thread contact area, distributing load evenly and preventing stress concentration. Particularly valuable in aerospace assemblies, industrial machinery, and automotive systems, this locknut maintains clamping force through the nylon insert's elastic recovery, which compensates for thermal expansion and vibration-induced settlement. The external hex drive facilitates installation in confined spaces while the 250°F temperature rating ensures performance in engine compartments and high-temperature industrial environments.

Specification Summary & Compliance

This locknut features precision 1/2"-20 UNF fine threads with Class 3B thread fit for superior engagement and load distribution. The product strictly conforms to MS21044-N8 military specification requirements, ensuring consistent quality and performance in critical applications. Dimensions include 3/4" width across flats and 19/32" height for standardized installation. The right-hand thread direction and external hex drive provide industry-standard compatibility. Manufacturing complies with relevant industrial standards for aerospace and defense applications, with material composition and plating processes meeting industry requirements for corrosion protection and mechanical performance.