Need to find 4mm screw head but long stick bit (for coat hooks)

[duriandurian]

New house and I bought lots of lovely coat hooks but they need 4mm screw heads and my DH reckons you can't buy long enough rawl plugs and stick bit of screw to make coat hook strong. Thought being that a stubby one wouldn't be able to support heavy winter coats etc.. It's an external wall.
Any suggestions what length and where I should look?
Thanks.

Why such a tiny screw head? Coat hooks should be screwed to a piece of wood ideally and then the wood fixed to the wall with bigger screws to take the weight.

What do your coat hooks look like?

Hmmm, my DH also keen on the wood option. I saw a nice picture of lovely floating individual coat hook and thought it looked a lot nicer. Coat hooks are these

your link doesn't work for me but I think you mean the metal stars with a concealed eyelet. Is 4mm the size of the hole in the eyelet?

If so, you need 4mm screws. Screws are measured by the width of the shank, not the size of the head.

Is you wall made of plastered brick? Or lightweight block? Or plasterboard on wooden studs? Or what?

You can get screws that are long enough, and suitable plasplugs.

Thank you @PigletJohn- feeling a bit starstruck!
Plastered brick Edwardian house. First home we have ever owned.
I have been amazed at just how long and tedious timelines for workmen (and DH) are for things that I thought fairly trivial- coat hooks and alcove bookshelves for e.g..
I am definitely not planning anything big for a few years (plus trades lead in time...).
Thanks for the advice, I will search online for suitable screws and plugs now that I know that they should be for sale somewhere.

On an Edwardian house you may have lime plaster an inch thick. It has no strength so the screw and plug need to go an inch into the brick behind. So you may need a 4x55mm screw. Tap the plug in below the surface of the plaster. Hoover out the dust first.

The internal bricks are likely to be poor quality, out of sight behind the plaster. If the plug is too loose, inject no-more-nails or a cheaper own brand deep into the hole and press the plug into it

Thank you. That is really helpful. I had assumed everything old was solid, so knowing not to trust the plaster is useful.