Non-standard fasteners refer to fasteners that do not need to correspond to the standard, that is, fasteners with no strict standard specifications can be freely controlled and matched. Usually, the customer puts forward specific requirements, and then the fastener manufacturer Based on these data and information, the manufacturing cost of non-standard fasteners is generally higher than that of standard fasteners. There are many types of non-standard fasteners. It is precisely because of this characteristic of non-standard fasteners that it is difficult to have a standardized classification of non-standard fasteners.

The biggest difference between standard fasteners and non-standard fasteners is whether there is standardization. The structure, size, drawing method, marking and other aspects of standard fasteners have strict specifications set by the country. (Parts), common standard fasteners include threaded parts, keys, pins, rolling bearings and so on.

Non-standard fasteners are different for each mold. The parts on the mold that are in contact with the product glue position are generally non-standard parts. The main ones are the front mold, the rear mold, and the insert. It can also be said that except for screws, faucets, thimbles, rubber rings, springs, and mold blanks, almost all the rest are non-standard fasteners. If you want to purchase non-standard fasteners, the purchaser should generally provide design inputs such as technical specifications, draft drawings, etc., and the supplier will evaluate the difficulty of achieving non-standard fasteners based on this, and initially estimate the production of non-standard fasteners Cost, batch size, production cycle, etc.