In order to ensure representativeness of the test results, production batches and inspection lots must be defined. A production batch is a finished fastener that is put in or produced at one time. These fasteners must be manufactured from the same batch of material, manufactured in the same process, heat treated in the same furnace, and the fasteners are of the same type and size. Inspectionlots are a number of finished fasteners that are assembled to perform a sampling inspection. For fasteners requiring heat treatment, one inspection lot must be from the same production batch and submitted by the manufacturer at one time. A production batch manufacturer is responsible for implementation and the manufacturer is responsible for the quality of the fasteners. Although certain project standards require only qualification testing and no quality consistency testing, manufacturers should be responsible for the eligibility of these projects. In order to ensure representativeness of the test results, production batches and inspection lots must be defined. A production batch is a finished fastener that is put in or produced at one time. These fasteners must be manufactured from the same batch of material, manufactured in the same process, heat treated in the same furnace, and the fasteners are of the same type and size. Inspectionlots are a number of finished fasteners that are assembled to perform a sampling inspection. For fasteners requiring heat treatment, one inspection lot must be from the same production batch and submitted by the manufacturer at one time. The re-inspection of the factory is a supervised sampling test of the quality of the fasteners purchased by the user. According to the requirements of the general quality management system, all purchased products (excluding homemade products) must be re-examined, otherwise the income pool cannot be verified. The general content of the re-inspection of the factory includes quality certification documents, appearance, re-inspection of dimensions and re-inspection of basic performance. Hex Head Bolt,Hex Screws,Hex Flange Head,Flange Head Nuts Shaoxing Grace International Trade Co.,Ltd , https://www.shaoxinggrace.com