UV wax in screws

[FrancoisY]

Overall, I believe UV wax on screws is to protect from and prolong the life of a screw during high heat temps. Is there any other purpose and how critical is this feature? does it act more of a lubricant at the end of the day?

 

[3DDave]

The UV part is so you can use ultraviolet light to see if the screws are coated with wax. The wax is to control friction during installation for consistent tension.