Years ago I left a shitty call center job and left a scathing review on glassdoor. About a year later I started getting hammered with requests for clarification or to remove the review entirely. I ignored them all, and never bothered to look back. It’s still up, but the company I worked for sold itself to some other shitty overlord that also had terrible employer reviews.

Machinist guy here!

Threads fail. Threads are generally the most likely thing to fail in any given mechanism. Generally, when the threads are expected to do more work than just sit there and not move, as in fastening a hinge for example, we try to make sure the threads are all the same kind of material.

I would never expect plastic threads to hold up to repeated use with an iron bolt inside. Something is going to give up, and it’s going to be the soft plastic threads, every single time.

Think about cheap as fuck IKEA furniture, any time they have a bolt to screw in, you install an insert first. We do the same thing in plastic, aluminum, shit even steel sometimes if we want the bolt to fail first.