Self tapping screws?

[freddiemercurystwin]

I was just trying to be funny getting a (dad) joke out of you saying sunk.

/I'll get me coat

 

[Dylan123]

Self tappers are for metal, they look like wood screws .You used the wrong bit , requires pz2 anything else will damage screw head .Good job it stuck, at that angle it might have burst out the sides.

is that pozi? I used pozi, it’s like a diamond shape

 

[mcprinter]

Pozi come in different sizes.
Your Drivers or Bits are likely to have PZ1 or PZ2 on them. PH1, PH2 (Phillips type) not suitable.
You need a Pozi Size 2

Do you have any chunky Side Cutters? https://www.screwfix.com/p/magnusson-side-cutters-6-160mm/9330v
If you grip the Head with them (as if you were trying the cut the Screw in half lengthways) you will probably loosen it.

 

[Deleted member 174758]

I bought these screws because they were self tapping. I didn’t think self tappers needed all this faf!

Self tappers don't work all that well on wood because the threads aren't deep enough. Wood screws are a lot better, but you still need the right size of pilot drill. Are these really self tappers or are they wood screws? For self tappers you need to drill a precisely sized pilot hole or they can stick in the hole or even shear off. Even for wood screws you need to drill the right size of pilot holes

The other thing is that some self-tappers have Phillips heads, although the little lines at 45 degrees to the lobes is what actually tells you have Pozidriv screws in this instance

 

[foxhole]

I don’t understand how this is possible.

the timber is 50mm by 50mm

I can drill the slightly larger hole, but the slightly smaller one below that, how am I supposed to drill a tiny 3mm drill bit through 50mm of the long piece? The drill bit is too small

100mm long bit.