Whilst many applications for fasteners require by their very definition that the item remains fastened, there are also many applications where a secure fastening is needed that can be undone in a hurry.
For these types of applications you need quick release fasteners. There are a wide variety available for just about any purpose that you can think of.
Quick Release Fasteners For Motor Sports
One common use where a strong fastening is required that needs to be able to be undone in a hurry is in motor sport. Quick release fastenings are nearly always used for securing the bonnet of saloon cars or rally cars, typically taking the form of a quick release bonnet pin.
You can also buy advanced forms of this called shear pin latches, which work on the same principle yet are aerodynamically smooth on top, with no pin sticking up to catch on things or affect airflow.
Push Turn Fasteners
Other examples of quick release fastenings are https://boltworld.co.uk/ cupboard doors on sailing boats, where to unlock a cupboard door a button is pushed inwards sharply and then it springs outwards, and is then turned to open the cupboard door. To lock it you just shut the door and push the button back in.
There are a wide variety of such push turn fasteners available for numerous applications.
Simple quick release fasteners can be found all around the home, with many kitchen cupboards and furniture being fitted with pre-tensioned, push to open or close, latches.
Quarter Turn Fasteners
Quarter turn fasteners are another common use of quick release fastenings, they are widely used in inspections panels with uses varying from industrial machinery to aircraft inspection panels. They are available in many different grades of metal and sizes to suit a wide variety of uses, as an example a quarter turn fastener used on an aircraft will have to be of a very high specification. Yet it works on exactly the same principle and does the same job as one securing an access panel on a drilling machine in a factory.