| BHEL, ONGC, Ministry of Defence, NTPC, ISRO Its major customers include: |
| Ashok Leyland Limited, Housur |
| Bharat Heavy Electrical Limited, Bhopal and Haridwar |
| Bharat Dynemics Limited, Bangalore |
| Central Salt and Marine Chemicals, Bhavnagar |
| Cochin Shipyard Limited, Cochin |
| Dgp Windsor, Kalol |
| Department of Space, ISRO, Thiruvananthapuram |
| Gujarat Ambuja Cement, Ahmedabad |
| Grasim Industries, Nagda |
| Heavy Water Plant, Baroda |
| Hindustan Aeronautic Limited, Koraput and Bangalore |
| Hindustan Lever Limited, Kerela |
| Indian Farmers Fertilisers Corporate, Kalol |
| Indian Oxigen Limited, Bombay |
| Indian Iron and Steel Limited, Calcutta |
| Indian Oil Corporation Limited, Panipat, Begusarai, Guahati and Kerela |
| Indian Petrochemicals Corporation Limited, Nagothane |
| Indian Railways, Calcutta |
| Irrigation Department, Ahmedabad |
| Larson and Turbo Limited, Baroda |
| Manufacturing Limited, Ichiputhurs |
| Ministry of Defence, Engine Factory, Avadi |
| National Aeronautics Laboratories, Bangalore |
| Nuclear Thermal Power Corporation, Kota,, Orissa, Jyotinagar, Karaikal |
| Oil and Natural Gas Corporation, Mehasana, Ahmedabad, Karaikal |
| Ordanance Factory, Katni, Pune,Jabalpur, Bhandara, Chennai Trichunpali |
| Transformer and Electricals, Ernakulam |
| Thermax Engineering Const. Company, Pune |
| Telco Automation Limited, Pune |
| Rail Coach Factory, Hussainpur |