Certain things like bikes, cars, and furniture use hexagonal bolts for fastening. Hex bolts can only be used with the right diameter key and they don’t slip like Phillips and Flatheads. Also, the hexagonal tip keeps bolts from falling so you don’t need a magnet to hold your fasteners. Furthermore, it’s easy to identify which Allen key you need for each fastener, and you can use ballpoint hex keys if you need to work at an angle.
Since the hex bolt design is so practical, why don’t we use this type of fastener for everything? Why don’t we see hex wood screws and hex drywall screws ?
Edit : I’m asking about fasteners in general (like screws, bolts, etc)
In: Engineering
Its really dependent on the anatomy of the fastener, its deeper than the head of the screw itself.
Screws have a shaft diameter, strength grade, head diameter, and head type. a designer typically has a tensile strength that the fastener, the screw, needs to accomplish and the designer can get this by manipulating the above parameters.
Another important thing to bring up is who is servicing the equipment. Most times, if its to be serviced by an end user at home, they’d use a philip/flat head since those tools are more likely go be at ur house.
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