The NAS6603-18 is a high-strength aerospace shear bolt from the NAS6600 series, used in aircraft structural assemblies where precise fit, high shear strength, and vibration resistance are required. It features a close-tolerance shank and a low-profile hex head, designed to provide accurate load transfer in structural joints without excessive play.

This bolt is commonly used in airframe structures, landing gear components, brackets, and other critical assemblies where reliability under cyclic loading and vibration is essential. The “-18” dash number defines the grip length, ensuring correct installation fit within standardized aerospace hardware configurations.

Manufactured to NAS specifications, it is typically made from high-strength alloy steel (often cadmium-plated or otherwise corrosion-protected), designed for durability in demanding aviation environments.

Key features include:

NAS6603-18 aerospace shear bolt
High-strength structural fastener (NAS series)
Close-tolerance shank for precise fit
Low-profile hex head design
Used in airframe and landing gear assemblies
Designed for shear load applications
Resistant to vibration and cyclic stress
Alloy steel construction (corrosion-protected)
Dash number defines grip length (18)
Direct replacement per NAS/MS aircraft standards