What are non-standard fasteners? What are the differences from standard fasteners?

Non-standard fasteners refer to fasteners that do not need to correspond to the standard, that is, fasteners that do not have strict standard specifications, can be freely controlled and matched, usually by the customer to put forward specific requirements, and then by 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 because of this characteristic of non-standard fasteners that it is difficult for non-standard fasteners to have a standardized classification.
The biggest difference between standard fasteners and non-standard fasteners is whether they are standardized. The structure, size, drawing method, and marking of standard fasteners have strict standards set by the state. (Parts) parts, common standard fasteners are 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 level are generally non-standard parts. The main ones are the front mold, the rear mold, and the insert. It can also be said that apart from screws, spouts, thimble, aprons, springs, and mold blanks, almost all are non-standard fasteners. If you want to purchase non-standard fasteners, you should generally provide design input such as technical specifications, drawings and drafts, and the supplier will evaluate the difficulty of non-standard fasteners based on this, and preliminary estimate the production of non-standard fasteners. Cost, batch, production cycle, etc.