S-90507A044 1/2"-20 Cap Nuts

Key Features & Benefits at a Glance

• Superior vibration resistance through distorted thread locking technology that maintains clamp force in high-motion environments
• Excellent corrosion protection with 18-8 stainless steel construction for extended service life in harsh industrial conditions
• Precise thread engagement with Class 2B fit ensuring reliable fastening and consistent performance
• Enhanced installation control via external hex drive design for secure tool engagement and torque application
• Optimal sealing capability with standard cap nut profile that protects threads and prevents contamination
• Fine thread advantage with UNF 1/2"-20 configuration providing better tension control in critical applications
• Regulatory compliance assurance meeting RoHS 3 and REACH standards for global industrial use

Professional Applications & Engineering Value

This 18-8 stainless steel cap locknut combines distorted thread locking technology with UNF fine threads to solve critical vibration-induced loosening problems in industrial machinery, automotive assemblies, and heavy equipment. The external hex drive enables precise torque application while the Class 2B thread fit ensures consistent engagement without galling. The corrosion-resistant stainless steel construction maintains integrity in demanding environments where moisture, chemicals, or temperature variations would compromise ordinary fasteners. The cap nut design provides both thread protection and finished appearance, making it ideal for exposed fastening applications in manufacturing, transportation, and structural assemblies where reliability cannot be compromised.

Specification Summary & Compliance

This 1/2"-20 UNF cap locknut features Class 2B thread tolerance for precision fit, right-hand thread direction, and distorted thread locking mechanism. Manufacturing complies with RoHS 3 (2015/863/EU) and REACH (EC 1907/2006) regulations, ensuring environmental compliance for industrial applications. Dimensions include 3/4" width across flats and 13/16" height for standard tool compatibility. The fine thread spacing and 1/2" thread depth provide optimal engagement for critical fastening requirements.