And you thought Lockheed Made the C-141
More than 60 percent (by weight) of the C-141 was built by sub-contractors.
Here's a list of the major component builders/suppliers.   In all, parts of the
aircraft came from 34 of the 50 states.
Contractor Location Items Supplied
Rohr Corporation Chula Vista, CA and Winder, GA Nacelles, pylons and thrust reversers
Rohr Corporation Riverside, CA Main Landing Gear Doors, wing to body panels, clamshell doors
General Dynamics / Convair San Diego, CA Empenage
Menasco Mfg Co Burbank, CA and Fort Worth, TX Main Landing Gear Menasco Manufacturing was established by Albert Menasco in Los Angeles in 1926.  The company's first product was an air-cooled rebuild of a Salmson radial. In 1929, Menasco introduced the 4-A, the first of what was to become its main product line, the inverted, in-line engine. Menasco was deeply involved with air racing and his products were popular with racers looking for small displacement engines.  The company ended engine development and manufacturing after World War II.  Most recently Menasco Aerospace was known for its landing gear and, as part of Coltec Industries, was acquired by Goodrich Aerospace in 1999.
Bendix - Eclipse-Pioneer Division Teterboro, NJ Automatic Flight Control System
Bendix - Pacific Division North Hollywood, CA Anti-Skid system
Cleveland Pneumatic Tool Co Clevland, OH Nose Gear, wing flap tracks
Avco - Aerospace Structures Div Nashville, TN Wing Box Beams
Twin Industries Buffalo, NY Wing Leading and Trailing Edge Panels
Brunswick Marion, VA Nose Radome, tail cone
Shawnee Industries Shawnee, OK Rear Pressue Door, crew door, metal emergency exits, wing tips, rear entry door
Bell Aerosystems Buffalo, NY Floor Plates
Beech Aircraft Wichita, KS Wing Flaps, emergency exits, honecomb, nose gear doors, spoilers
Loud Company Pamona, CA Restraint Rails
Brooks and Perkins Detroit, MI Roller assemblies
Collins Radio Cedar Rapids IA HF antenna system
Garret  Los Angeles CA and Phoenix, AZ Environmental Systems
GE  Waynesboro, WV, Erie PA, and West Lynn MA Electrical Systems
Jarry Hydralics Ltd Montreal and Quebec Wing Spoiler Actuation Systems
Kelsey-Hayes Springfield, OH Flap Actuation System
Liquidometer Corp Long Island NY Fluid Quantity Gauging System
Pesco Prodcuts Div of Borg-Warner Bedford, OH Thrust Reverser Actuators
PneumoDynamics Kalamazoo, MI Power Booster System
Walter Kidde and Co Belleville, NJ Fire Detection Systems
Western Gear Corp Lynwood, CA Stabilizer and Pitch Trim Actuators
The company, which traces genealogy indirectly to a San Francisco machine shop operating in 1888, was privately held until October 1968, primarily by the members of "The Family Bannan." Western Gear today, which anticipates sales of $130 million in 1969, has facilities to design and manufacture complete mechanical systems for marine, oceanography, aerospace, medical, specialized equipment, engineered construction and general industrial applications.