Double head wire is actually quite simple to manufacture, the main need to dial material, that is, let the crooked material to dial straight, in order to carry out the following several processes of production. In the production or construction of double head screws is mainly anti-loosening purpose, if long-term friction in the machinery under the operation is, must be regular periods of maintenance, such as the operation is found to have a strange sound or not smooth conditions or found abnormalities should be overhauled and replaced, in the overhaul is to pay attention to the gears, pitch and other conditions, in the installation of their own attention to their own force in the process of installation, the choice of matching bolts and studs. As time is too long is the nut rust phenomenon, this situation is generally difficult to uninstall, appeared after the first to the oil, spray above, and so on for a period of time more lubricated with the appropriate wrench to screw the nut, in screwing the nut when pay attention to the force, can not be the teeth of the nut broken. For the flow of media and sealing elements shall choose the correct double head screws.