Why are fasteners important??? Fasteners play a very essential and vital role in this engineering world. Whenever you heard the word ‘fasteners’ there must be popup in your mind that it must be some screws, bolts or nuts. Yes it is, but there are many more fasteners which we are going to know about in this article Fastener is a hardware device which is used to join or holds materials together generally as a non-permanent joint. Yes, joint can be non-permanent or permanent; the joined components can easily be separated without damaging the joint in the former one and the joint gets damaged or reduces the strength in case of later one. Fastener is a main hardware component which is used nearly everywhere, be it your door hinge or some house hold appliance, be it automobile, machineries, construction, infrastructure or all other items which require assembly will certainly have fasteners to affix them.