Dating nuts hardware
Around the first century, screw shaped tools became common, however, historians do not know who invented the first.Early screws were made from wood and were used in wine presses, olive oil presses, and for pressing clothes.
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They are also much less likely to become rounded-off after repeated loosening/tightening cycles.
Square nuts are typically mated with square-headed bolts.
In the early 1930s, the Phillips head screw was invented by Henry Phillips.
Compared to standard hex nuts, square nuts have a greater surface in contact with the part being fastened, and therefore provide greater resistance to loosening (though also greater resistance to tightening).
The square shape made it possible to form a tool in order to tighten nut in place.
Later wooden fasteners were replaced by steel ones, and modern nuts are forged from steel stock bars and used along with steel bolts.
Boil away the jargon and it means that bolts work by clamping things together under tension and that both the connection and the bolt must be strong enough resist any force that tries to break that connection or the bolt that’s holding it together.
Before we go much further let me point out that while there are formal definitions that distinguish bolts from screws, it’s a lot easier (and just as cor- rect in an informal setting) to use either term to describe threaded fasteners, so unless we need to identify a particular type of fastener, such as sheet metal screw or Allen head bolt, we’ll use the terms screw and bolt interchangeably.
Metal screws and nuts used to fasten two objects together first appeared in the fifteenth century.