You can't just take and screw a self-tapping screw into a tree - any more or less experienced carpenter will tell you about this. To begin with, you need to do something that will make it possible in the future to significantly facilitate the screwing of self-tapping screws, as well as (if necessary) their extraction. In addition, the described tricky procedure will allow you to extend the life of hardware in difficult, aggressive conditions. So what needs to be done?
In fact, this applies not only to screws, but also to any other hardware that is screwed in somewhere. With rare exceptions, it is recommended that bolts, nuts and screws be thoroughly lubricated before use. Of course, you cannot lubricate the hardware with anything at all. It is strictly forbidden to do this using soap and oil. Both the one and the other do not have the best effect on wood, and after a long time, these materials will significantly complicate the extraction of the screws. Of course, you shouldn't even try to use edible oils as a lubricant.
It is best to use lithol or graphite grease for processing screws. Both have amazing sliding properties. In rare cases, when you need to screw in a screw "for ages", you can cover it with epoxy resin. This will provide additional structural strength in the future.
It is highly recommended to lubricate the screws when working with wood. First of all, this concerns hardware, which are driven into the wood material when working with various kinds of floors, as well as when working with the floor. It is also important that the lubrication of the hardware will prevent further squeaking in the places where the screws are tightened.
Is this mandatory? In most cases, lubricating screws is strongly recommended when working with wood. However, it can be neglected if there is no way to quickly get the funds mentioned. In this case, you can simplify your further work by pre-drilling a hole of a smaller diameter for each screw to be screwed.
Continuing the topic, you can read about how to use the necks from plastic bottles with benefit on the farm.