Motor Winding Manufacturers
| Custom Brake & Electric Co (Lubbock, TX) |
| Custom Coils Inc (Jacksonville, TX) |
| Custom Conduit (Albertville, MN) |
| Cycle Electric Inc (Englewood, OH) |
| Cyclomaster Co (Madbury, NH) |
| D & M Block Shop (Raceland, LA) |
| D & M Marine Inc (Bristol, ME) |
| D & R Electric Motors (Concho, AZ) |
| D C Electric & Machine Co (Charlotte, NC) |
| D C Specialists (Pompano Beach, FL) |
| D Electric Inc (Pottstown, PA)
Manufacturer |
| D L C Power Diesel Corp (Hialeah, FL) |
| D L Hermanson & Assoc (Tualatin, OR) |
| Da Fox & Assoc Inc (Maryland Heights, MO) |
| Dale's Prop Shop (Emily, MN) |
| Danfoss Bauer (Somerset, NJ) |
| Daniel Wagner & Assoc Inc (Willow Spring, NC) |
| Dave Mungenast Motorsport (Saint Louis, MO) |
| Dave's Marine Svc & Salvage (Drasco, AR) |
| Dayton-Phoenix Group Inc (Dayton, OH) |
| De Kalb Marine Inc (Decatur, GA) |
| Decatur Alternator & Battery (Decatur, AL) |
| Delange Sales (Algonac, MI) |
| Delhomme Industries Inc (New Iberia, LA) |
| Delta Armature & Motor Works (Yoakum, TX) |
