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
Sizing matters. Really small screws can’t have a hex. You’d strip that out the first time you over tighten.
Also, you can buy 2 or three sizes of flathead or Phillips head screwdrivers and be good for 95% of screws out there. You have to have the exact size for hex.
All in all, it really depends on the application of the fastener.
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