- Alcan Spring
- Alco Spring Ind Inc
- Alfred & William Spring Inc
- Allied Spring & Svc Inc
- Arthur I Platt Co
- Auto Spring Co Inc
- Auto Spring Svc & Heliarc Weld
- Auto Spring Svc & Heliarc Weld
- Beall Transport Equipment Co
- Betts Spring Co
- Bristol Spring Mfg Co
- Brooks Towing
- Brooks Truck & Auto
- Brooks Truck Parts
- Brooks Trucking & Excavating
- Brooks Well Drilling & Pump
- Capital Spring Co
- Dayon Manufacturing Inc
- Dearborn Spring Co
- Gardner Spring Inc
- George W Lane Co
- Hanley's Blacksmith & Spring
- Haven Steel Products Inc
- Imperial Spring Co Inc
- Ironmonger Spring Co
- Jenson & Mitchell
- Laher Spring Corp
- Michigan Spring Co
- Middleton & Meads Co
- Monticello Spring Corp
- Murphy & Read Spring Mfg Co
- Newcomb Spring Corp
- Northwest Spring & Mfg Co
- Novi Spring Co Inc
- Pa-Ted Spring Co LLC
- Peck Spring Corp
- Peterson Spring
- Pontotoc Spring
- Rolex Co
- Schindler Spring Co Inc
- SEI Metalforms
- Smalley Steel Ring Co
- Southern Spring & Stamping Inc
- Stabilus
- Standard Springs Inc
- Stanley Spring & Suspension
- Steelcraft Industries
- Thomas Spring Co
- Toledo Commutator
- Tollman Spring Co
- Vadnais Technologies Corp
- Winamac Coil Spring Inc
