On 23/10/2020 15:56:02, michael adams wrote:
"Fredxx" wrote in message ...

I don't understand why you persist.
https://www.leytonfasteners.co.uk/bo...w-information/

Common UK parlance for a bolt and a set screw is that there is thread the entire length
of the set screw, whereas a bolt is only partly threaded.


Clearly the "experts" at the University of Leytonfasteners along with Professor Turnip
have never heard of "roofing bolts" either.

https://www.google.co.uk/search?q=ro...w=1024&bih=642

Again, you're talking of another profession. I'm sure he has heard of
them in much the same way I have come across them.

As others have said screws/bolts with a different head, in this case a
dual slotted head, are sometimes referred to interchangeably.

Is it really so hard for you to accept?