The phrase 'to put the screws on' someone implies compe […]
The phrase 'to put the screws on' someone implies compelling him or her to take steps that they do not want to and originates from the practice of employing unpleasant instruments like thumbscrews in the old days to make a person to accomplish what you wished. The good news is, we aren't dealing with old-fashioned pain gadgets below but instead, the innocent and very convenient fastening things named 'screws' which possess a multitude of uses.
The notion of the screw has existed for thousands of years when Archimedes designed it around two hundred BC. Having said that, Archimedes' screw was totally different in application to the fasteners of modern times and the metallic anchors we are acquainted with basically appeared at some point in the 1400s. Surely, there had been wood screws existing earlier than this point in time but these were most often located in presses for clothes, wines and olive oil.
Whenever you approach a hardware shop to purchase a number of screws you will see that there's a multitude of differing types that you can buy, all with an unique purpose. The humble screw has evolved to cater to many kinds of demands from suspending a toy aircraft from the ceiling (utilize an eye screw) to attaching legs to wooden tables (use a hanger screw). You can even find distinctive tamper-proof anchors called tri-wing screws intended for use in the Wii to ensure that folks cannot attempt to fix these at home.
There are fasteners suitable for wood, steel, mortar, cement, and drywall and every type of screw has been exclusively made to meet its purpose, hence you shouldn't follow the 'screw is a screw is a screw' perspective and use any kind of old screws one happens to have available. Nobody wants 7 years of bad luck just because they used the wrong screws to affix a mirror to the wall surface and it dropped off and smashed. FYI, one ought to make use of the anchor that possesses rather obvious moniker, 'mirror screw', for this undertaking.
Aside from the type of thread they have, screws are also available in a range of different types of heads (dome head, cheese head or conical head, for example), or without any head whatsoever, and possessing several films (stainless steel, zinc oxide, or galvanic, for instance). Some kinds of fasteners are even labeled after their inventors, similar to the Robertson screw and the Phillips head screw. One of the more intriguing screw tops has a heptagonal opening that has to be screwed or unscrewed by using an Allen key instead of an ordinary screwdriver. The majority of screws in this world have a right-hand thread however this only means that they are tightened in a clockwise direction and, unlike scissors, ought not to produce a problem for left-handed people.
Then again, there appears to be some misunderstandings concerning the semantic difference involving screws and bolts due to their ancient purposes and usages. In actual fact, there's still no universally-accepted distinction relating to the pair though the basic notion is that fasteners are smaller compared to bolts and are usually tapered, whilst bolts usually are not. Therefore, if you know nothing about screws, it could be a good idea to learn to determine the variance between bolts and anchoring screws or you might wind up getting the incorrect thing when you ask for screws at the home improvement store. However, if you are a female, it's possible to save the effort and get your man to buy them for you.