What is this screw supposed to be used for?

[clippan]

Hi, I've got hold of a package with screws with a slightly different thread.
What is the one below used for? The top one is "standard thread"

 

[Krilleman]

Hi, got hold of a package of screws with a slightly different thread.
What is the lower one used for? The upper one is "normal thread"

Looks like regular decking screws.

 

[Centano]

Isn't it for lättbetong? The lower screw.

 

[clippan]

Okay thanks but they are quite long, 14 cm.

 

[Krilleman]

Isn't it for lightweight concrete? The lower screw.

Lightweight concrete screws are usually a bit thicker, around 8/10mm.

 

[FredrikR]

Lightweight concrete or perhaps chipboard?

 

[clippan]

14 cm is probably too long for decking screws, right? Lightweight concrete, on the other hand, seems reasonable, doesn't it?

 

[clippan]

Diameter about 5 mm on the non-threaded part

 

[raveper]

Quick screwing in and tightening something.

 

[Isakare]

Have piles of those screws in various lengths, our large wooden packaging is partially screwed together for easier opening, previously they were nailed.
So, long quick screw to replace nail.