I have been following all the comments about vibrations on the antenna causing mounting hardware to loosen.? I have used the following type of hardware for years at commercial sites and can't remember where we have had any hardware loosen up for whatever?reasons.? The attached link below uses one nut and one split ring washer at every point where any tightening is to happen for mounting.? All the big boys, 2 way communication, cell site antennas etc use this type of hardware and once it is up it is never touched again until it has to come down or be moved.? No criticisms intended, just my opinion.
I would NEVER USE LOCKING COMPOUND ON PLASTICS. Many locking compounds can destroy plastic parts over time, they are formulated for locking metal part not plastics.? Same goes for some greases. One former employee used locking compound on plastic nuts, cost ?35,000 to replace the parts.
One Italian manufacturer used a grease to ease driving screws into plastic pillars. After a year the pillars disintegrated and cost the manufacturer a lot of money.
