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Figure 1.   The NASA prime contractors
NASA's prime contractors in the Apollo program.
- Chrysler: S-IB stage
- Boeing: S-IC stage
- North American Aviation (NAA): S-II stage and the Apollo Command Module and Service Module (CSM)
- Douglas Aircraft Company: S-IVB stage
- North American Aviation, Rocketdyne Division: H-1 engines for the S-IB stage, F-1 engines for the S-IC stage, J-2 engines for the S-II and S-IVB stage
- Grumman: Lunar Module (LM) ascent and descent stage
NAA had many subcontractors to construct the Apollo CSM. One will be mentioned: Aerojet General Corp., the subcontractor who has built the Service Propulsion System (SPS)
Grumman also had many subcontractors to construct the Apollo LM. Two will be mentioned:
- Space Technology Laboratories, the subcontractor who has built the LM descent engine
- Bell Aerosystems, the subcontractor who has built the LM ascent engine
The locations of these contractors, the assembly sites and the test sites which have been used by them are shown on a map in figure 2.
There were thousands of other subcontractors involved in the realization of the Saturn V - Apollo. Some of them are mentioned in the grey colored callouts.
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