Here is what it says in the construction drawing.

2 pcs. R- 45×200 C24 × 1500 mm.
The reinforcement is glued to the primary element with a suitable structural adhesive, with a strength of at least 3MPa.
The connectors are fitted with a density of at least 1 item per dm2 and in an environment that ensures good adhesion and curing of the adhesive.
The reinforcement pieces follow the graindirection of the primary element.
The reinforcement is mounted on both sides of the element.
48 × Square nails FZ, 3.1×75 fz /side

Can't find anything when googling square nails or fyrkantsspik.

Which nail should I buy that can be shot with a nail gun?

Which glue would you buy?

Thank you!

/Kristofer
 
Claes Sörmland
It's probably regular 75 mm nails, they are square and not round.

What are you going to glue? Wood to wood?
 
I am going to reinforce a 100x200 beam on both sides with 45x170. The reinforcements will be glued and nailed. I would prefer to find a nail that can be applied with a nail gun.
 
Assuming that the stiffening braces should be flat against the high edge of the existing beam, so that an H-beam/bracket is formed? Otherwise, there isn't much reinforcement to speak of.

Normally, 125 mm nails should be used, although slightly denser with 100 mm is probably more often used. In the end, it's the glue that's supposed to take the load, right?

75 mm long (short!) nails to fasten a 45 mm thick bracket are way too short. They don't provide any decent hold, not even to act as a clamp during the glue's curing phase.
 
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