Seachoice RP-SC1329 Stainless Steel Nylon Insert Locknut - 4-40

The Seachoice RP-SC1329 is a 4-40 stainless steel nylon insert locknut designed for marine applications where corrosion resistance and vibration-proof fastening are essential. The integrated nylon insert provides superior locking performance by creating friction against the bolt threads, preventing the nut from loosening due to vibration or movement.

Key Features:

• Stainless steel construction resists corrosion in harsh marine environments
• Nylon insert creates a prevailing torque lock that prevents loosening
• 4-40 thread size for small hardware applications
• Reusable design maintains locking performance through multiple installations
• Sold in convenient 100-piece bag for marine maintenance and repairs

Ideal for securing hardware on boats, trailers, and other marine equipment where standard nuts may vibrate loose. The nylon insert locknut eliminates the need for additional locking washers or thread-locking compounds.