Black Coated Screws Update
Channel: RF elements s.r.o.
Date: 2020-11-05

RF elements antenna hardware is from now on delivered with Anti-Friction coating recognized by black color of the screw. It effectively protects the screw from seizing and improved user experience - you don't need to use messy lubricant anymore.

We use stainless steel because it lasts longer and does not corrode. It's disadvantage is stainless steel galling - when the screw seizes because of excessive heat produced between the thread and the screw due to high friction. The known and working solution is to use anti-seize lubricant, but it's rather messy to deal with the thick paste, especially while hanging on a tower. This is why at RF elements we chose to deal with it once and for all.

The thin black layer is a polymer-based tribological dry coating with organic, submicroscopic lubricant particles. With 3x smaller friction compared to a non-coated screw, you will feel like you can keep tightening the black screw forever. The crew will survive, but you will bend the rest of the bracket beyond the point of repair, so be careful with that.

The maximum torque we recommend is 20 N.m (15 lb.ft) - use a torque wrench to tighten the black screws until you develop the muscle memory to do it with an ordinary wrench without over-tightening.

Good bye seized bolts, hello broken brackets :D

0:00 The problem
0:54 The Solution :)

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