ARP 200-8664 Hex Nyloc Nuts 3/8-16 Thread (5-Pack)

ARP 200-8664 is a 5-piece kit of premium hex nyloc nuts featuring 3/8-16 coarse thread pitch with cadmium plating for superior corrosion resistance. These self-locking nuts utilize an integrated nylon insert that creates friction against the bolt threads, preventing loosening from vibration and ensuring reliable fastening in high-performance applications.

Key Features:

• 3/8-16 coarse thread pitch for standard compatibility
• Cadmium-plated finish for enhanced corrosion protection
• Nylon lock insert prevents self-loosening under vibration
• Hex head design for easy installation with standard wrenches
• Includes 5 nuts per kit

Ideal for securing cylinder heads, intake manifolds, exhaust components, and other critical engine fastening applications where vibration resistance is essential. The cadmium coating provides excellent protection in high-heat environments while maintaining precise thread tolerances.