I suppose this happens in any company damfan.
I retired, as mentioned in another thread, from a Rubber & Polymer factory. Everything is set down as far what happens to every component of a finished product. From, in our case, the raw elements are tested at the supplier, we re-test them in our labs and we mix them to a very rigid/concise recipe.
Then the clips, rods, steel that they'll be molded to is inspected and passed if okay, down to the molding operators. Their molds have to be cleaned, sprayed with lubricants, etc.. Then the hard pieces are inserted into the molds and slugs, of rubber or polymer cover them (in the case of non-injected molding) and cured at a precise temperature for a pre-set time limit and then taken out, trimmed and placed in a tub for inspection.
After this in any buffing is done - it's completed and put into a tub when completed and inspected again. Every part at every step is inspected by the operators and floor inspectors.
I could go on for a long time about other stages of different lines in our plant but what I want to say really, is that if one stage in the process from the raw elements, to the components being used, to make a finished part, slips past an operator, or floor inspector - a tremendous amount of defective parts can leave the building with terrible consequences. Heads roll.
We have had entire crews put on probation, written up etc. for these slips. It only takes one person (or crew) with a bad attitude, problems at home, drinking/drugs or whatever, to make the whole system break down.
There are way too many safeguards installed in a big company to allow this sort of thing to occur. This could be as simple as an automated fastener machine being set "too tight."
That's why I recommended that you send it back. It's not only best for you, but you may save 100 or even 1000 customers the same problem by the company going back in the steps and pin-pointing the exact place (supplier/machine/automated press/crew/employee/inspector) that has allowed sub-standard product to be made and passed off as A1 - 100% Quality Items.....just saying
