Top 10 Most Requested NSN Parts in the Aerospace Industry

National Stock Numbers (NSNs) are a vital tool for successful aerospace maintenance and repair operations, these 13-digit numbers serving to standardize various components and enable swift procurement without ambiguity. Though it is hard to pinpoint which NSN parts are truly the most purchased for aerospace operations, there are a diverse range of factors that can provide a general idea of what options are the most common, including usage frequency, replacement rates, and presence in critical systems, as well as trends from procurement reports and aviation supply chain databases. In no particular order, each of the following items in this blog could be considered some of the top NSN parts based on their essential structural or operational functions and the purchasing habits of Dash NSN customers.

1. Fluid Pressure Regulating Valve – NSN 1650-01-578-6606

This fluid pressure regulating valve is a precision-engineered component used to manage turbine blade tip clearance in high-pressure turbine sections, particularly in CFM56-7 engines. Installed within an engine's pressure control circuitry, the valve regulates airflow and pressure to optimize performance, maintain temperature margins, and uphold mechanical stability during various flight conditions.

2. Mounting Bracket – NSN 5340-01-508-1824

This aircraft-grade mounting bracket serves as a fixed support platform for a range of onboard systems, including electronic sensors, avionics modules, or structural assemblies. Its precise tolerances and compatibility with multiple fastener types ensures secure, well-aligned, and vibration-resistant attachment within high-stress areas of an airframe.

3. Balance Weight – NSN 6610-00-469-5279

A small but essential mass component, this balance weight is attached to control surfaces like rudders, ailerons, or elevators to counteract aerodynamic forces and prevent control flutter. Positioned precisely along the control surface's axis, it fine-tunes the dynamic balance for smooth and stable flight control input, reducing strain on actuators and improving responsiveness during high speeds or turbulence.

4. Air Motor Parts Kit –NSN 2895-01-199-4305

This air motor parts kit provides various necessary components for overhauling air motors, which are pneumatic devices that convert compressed air into rotary motion. The kit includes high-wear components like bearings, seals, gaskets, and vanes that support onboard auxiliary mechanisms, allowing for efficient refurbishment and minimizing aircraft downtime. As such, this kit helps operators keep air motors compliant with operational standards and mission readiness.

5. Air Fitting Structural Component – NSN 1560-00-959-7742

Installed within the fuselage or wing assemblies of an aircraft, this air fitting structural component facilitates the routing and attachment of pneumatic lines. By providing both mechanical support and leak-resistant sealing, this component helps maintain the integrity of pressurized air systems used for tasks like cabin control or de-icing subsystems, even under pressure changes and vibration.

6. Magnet Rotor – NSN 6680-00-467-7709

This magnet rotor is a dynamic element used in a tachometer generator system, typically mounted on engine accessory gearboxes. It rotates within a stator coil to generate a variable electrical signal proportional to engine rotational speed (RPM) relayed to cockpit instruments, allowing pilots to monitor engine performance in real time.

7. Tail Assembly – NSN 1560-01-249-8734

This tail assembly forms a major section of the aircraft empennage and includes structural components supporting the vertical and horizontal stabilizers. Constructed using lightweight composite or aluminum materials, this assembly is carefully engineered to withstand aerodynamic forces while maintaining ideal weight distribution. Additionally, it plays a central role in providing control by managing yaw and pitch movements

8. Landing Gear Torque Collar – NSN 1620-01-660-7521

This landing gear torque collar is a cylindrical structural element used to align and stabilize the movement of landing gear during deployment and retraction. Installed between the shock strut and gear linkage, it absorbs torsional loads and prevents over-rotation or misalignment under stress, especially during high-impact operations like landings or carrier recoveries.

9. Structural Bracket – NSN 1560-00-975-6467

Serving to secure systems within an airframe, this structural bracket is usually responsible for supporting hydraulic lines, control cables, or avionics enclosures. Built for high load-bearing capacity and precision fitment, its rigid design maintains structural alignment while reducing vibration, thereby ensuring that critical systems remain in optimal working condition during all flight phases.

10. Seat Cushion and Cover Assembly – NSN 1680-01-625-5752

This seat cushion and cover assembly is installed in crew seating within the cockpit or mission control areas, enhancing the comfort and safety of occupants when airborne. It integrates flame-resistant materials and ergonomic contours, meeting the strict durability and crashworthiness standards required in military and special mission aircraft.

Partner with Dash Fasteners for Aerospace NSN Parts

At Dash Fasteners, we specialize in providing easy access to the most in-demand aerospace NSN parts, from structural fasteners to electrical hardware. Our inventory features an extensive catalog of components that are certified to meet the highest standards of reliability and performance, all organized under standard NSN part numbers to streamline sourcing. Furthermore, we are committed to providing competitive pricing, prompt delivery, full traceability, and personalized service for every order. Bearing all of this in mind, be sure to explore our platform and get in touch with our team to see how we can serve your operational needs.