Automatic hot nut and bolt forging machines We are interested in the purchase of following complete unit: 1. Automatic Hot Nut forging production line 2. Automatic Bolt forging production line Our customer belongs from Railway industry and they have following general specifications available with them: • Bolt head: Rectangular 1inch • Maximum length of Bolt: 6 inches • Maximum thread area: 3 inches • Diameter of Bolt: 7/8 to 1 inch • Internal Diameter of Nut: According to above thread size.