I'm going to install some three-phase CEE/Schuko outlets in the garage and bought screw anchors from Biltema, M4x41 mm screws, with anchors for single gypsum board.
It feels like the dimensions are completely wrong and that they fit better to a 6mm wall than 13mm single gypsum board?

I thought it was supposed to expand INSIDE the wall, like in the picture, not expand IN THE MIDDLE OF THE GYPSUM?
That is, there should be about 10 mm between the expanded anchor and the head of the anchor.
The piece of wood it's in is about 3 mm.
Metal screw anchor showing expansion mechanism beside a wooden piece, illustrating correct installation in a plasterboard wall.

I also bought ones like this, maybe I should use them instead?
I want the 3-phase outlet to stay in the wall.
M4x41mm screw and anchor for drywall installation, debated for suitability in 13mm gypsum walls, highlighting installation differences in a garage setup.
 
4E has a grip width of 5-10mm exactly according to the specs on Feltema's website so you've received what you purchased:o

A tip - Mount the socket on a wooden board so you have room for more gipsankare if you want a really solid attachment.
 
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Did I buy the wrong one?
Then it's probably not for enkelgips, is it?
 
Yes, I bought the wrong one.
Should have gotten this one instead!
Found it in the wall at a place, it seems fantastic!
Doesn't seem so easy to get hold of if you dislike paying 14 kr each.
Instruction diagram for a zinc-coated mini plug with a saw tooth edge, featuring tools like a hammer for use in materials like gypsum board. Product code E1509111.

E-number E1509111
 
Available at Jula. 10 pcs 39,90...Not top quality but works well.
 
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