A self-tapping screw can simply be taken and screwed. However, if the hardware is not properly prepared in advance, then such a solution may not be the best and not the most reliable in the end. Experienced craftsmen do not advise acting at random and strongly recommend that you always resort to the help of additional materials when preparing screws. It is necessary to process the hardware in the first place so that they enter more easily and sit more securely.
Do I need to prepare screws for work? As you might have guessed thanks to the introduction - you need to. Most masters will tell the owner about this. The main thing to do is to lubricate the screws before direct use. Moreover, in reality, it is worth lubricating most hardware, including bolts and screws. Of course, for the role of a lubricant, you should not choose the first oily liquid that comes to hand, but something that has been proven over years of practice.
If you want the screws to twist one or two times, then it is best to choose graphite grease or lithol for work. It is also worth noting that it is strictly forbidden to use handicraft products such as vegetable oil, butter and soap along with hardware. All of the above has an extremely negative effect not only on the metal, but also on the tree into which it will be screwed. At the same time, that lithol, that any other graphite lubricant will reduce the number of squeaks, protect the hardware from rust, and the tree from decay.
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Oiling screws is not a tricky business. Just dip the screw thread into the lubricant and proceed to twisting. In the future, both the hardware and the wall into which it was screwed will only thank the owner. Thanks to lubrication, all components of the structure last much longer. And most importantly, it becomes much easier to work. It is also worth adding that it will never be superfluous to keep a jar of lithol or graphite grease at home. Both tools are traditionally used not only to solve problems with self-tapping screws.
In continuation of the topic, read about "five" myths about drillswhich only make us spend more.
Source: https://novate.ru/blogs/140622/63274/