Rohtas Auto Industries: Special Fastner: We are manufacturing a wide range of hot and cold forged components like: 1. Various type of hex headed studs. 2. Hex Punch type bolt. 3. Special type of Cap Nuts 4. Hex Connector 5. Lifter 6. Threaded Insert. 7. Collar Bolts We have hot forging capacity up to 150mm diameter to be forged.