1, standard parts / fasteners manufacturing industry with bolts, nuts connected fasteners a lot, should ensure that it has enough preload, but it can not be tightened too tight. If the screw is too tight, on the one hand will make the joint under the action of external force to produce permanent deformation; the other hand will make the bolt to produce permanent deformation, preload but decreased, and even cause slippery wire or broken phenomenon, and high quality service.
2, motorcycle manufacturing industry with a bolt on the motorcycle, nuts connected to a lot of fasteners, should ensure that it has enough preload, but it can not be screwed too tight. If the screw is too tight, on the one hand will make the joint under the action of external force to produce permanent deformation; the other hand will make the bolt tensile deformation, preload force but decreased, and even cause slip wire or broken phenomenon. And quality service
3, the automotive industry in the field with bolts, nuts connected a lot of fasteners, should ensure that it has enough preload, but can not be too tight tight. If the screw is too tight, on the one hand will make the joint under the action of external force to produce permanent deformation; the other hand will make the bolt tensile deformation, preload force but decreased, and even cause slip wire or broken phenomenon. And quality service
4, the construction area of steel structure with bolts, nuts connected a lot of fasteners, should ensure that it has enough preload, but it can not be too tight. If the screw is too tight, on the one hand will make the joint under the action of external force to produce permanent deformation; the other hand will make the bolt tensile deformation, preload force but decreased, and even cause slip wire or broken phenomenon. And quality service