ARP 400-8771 Fine Thread Nyloc Hex Nuts - 5-Pack

ARP's 400-8771 fine thread Nyloc hex nuts deliver professional-grade fastening reliability for demanding engine applications. Constructed from premium aerospace-quality materials, these self-locking nuts feature an integrated nylon insert that prevents loosening from vibration while maintaining precise torque values.

Key Features:

• Aerospace-quality materials rated at 180,000 psi tensile strength
• Nylon locking insert prevents vibration-induced loosening
• Black oxide finish for corrosion resistance and professional appearance
• Manufactured to ARP's strict quality control standards
• Fine thread design for superior clamping force and precision adjustment
• 5-piece set provides replacements for critical engine fastening applications

These hex nuts are ideal for cylinder head assemblies, main caps, and other critical engine components where fastener reliability is essential. ARP's reputation for precision and quality makes these nuts a trusted choice for professional engine builders and performance enthusiasts.