336415: Guided Missile and Space Vehicle Propulsion Unit and Propulsion Unit Parts Manufacturing

What this code covers

NAICS 336415 covers propulsion units for guided missiles and space vehicles, the parts that go into them, and prototypes of both. That means solid rocket motors and their cases, nozzles and igniters, liquid rocket engines with their thrust chambers, injectors, turbopumps and valves, and small thrusters for attitude control. The complete vehicle is 336414, and non-propulsion parts are 336419.

Small shops enter through the parts: machined injector plates and manifolds, nozzle and throat components, valve bodies and seats, motor case hardware, brackets, tubing and test stand fixtures. The propulsion primes and the launch companies buy most of it, while the Missile Defense Agency, Army aviation and missile buyers, Navy Strategic Systems Programs, Space Systems Command and NASA Marshall and Stennis are the public buyers behind them.

What federal buyers typically ask for

AS9100 is assumed, with Nadcap for welding, brazing, heat treating, coatings and nondestructive testing. Material certs to AMS specifications, serialized traceability and first article inspection are routine. The DFARS specialty metals clause applies across the board: nozzles, chambers and cases are nickel, titanium and high-strength steel. Pressure vessels for spacecraft follow industry standards for design and proof testing that the buyer will cite.

Everything here is ITAR controlled under the launch vehicle and missile category, so registration comes before the drawing does. Solid propellant work adds explosives licensing, hazardous material handling and range safety requirements that keep most small shops on the inert side of the fence. Contracts with controlled unclassified information carry CMMC.

Propulsion units themselves go sole source or unrestricted to the motor and engine manufacturers. Small business set-asides show up for inert components, ground support and handling equipment, test fixtures and tooling. Research and development awards through SBIR and STTR are a second route in for a shop with a process advantage.