Help with screw identification pls

[Greatestfoe]

Hi. I’m building my first pc (obviously) and I bought most the parts awhile back. After a nightmare of getting the first boot I think I have it ready for case. I’m wondering if these (picture below) are the motherboard screws. There’s 6 little bags of different screws maybe I can get some help later with those. 

[AshRiver]

It looks like motherboard standoff mounting screw.

[harryk]

Those screws are for mounting fans. They are coarse self-tapping screws meant for use in plastic. 

 

https://en.wikipedia.org/wiki/Computer_case_screws

[CommanderAlex]

3 minutes ago, harryk said:

Those screws are for mounting fans. They are coarse self-tapping screws meant for use in plastic. 

 

https://en.wikipedia.org/wiki/Computer_case_screws

I agree with harryk on this one. I've used those screws for case fans and according to my case's owners manual, that is what those screws in the pictures are. 

[Kisai]

20 hours ago, Greatestfoe said:

Hi. I’m building my first pc (obviously) and I bought most the parts awhile back. After a nightmare of getting the first boot I think I have it ready for case. I’m wondering if these (picture below) are the motherboard screws. There’s 6 little bags of different screws maybe I can get some help later with those. 

Most chassis come assembled. Check the manual.

 

The only part that this resembles to me is the power supply mount, but look for additional holes in the chassis, sometimes parts are for optional equipment like fans RGB mounts, and so forth.

[aDoomGuy]

Looks like fan screws to me.

[Letgomyleghoe]

3 hours ago, Kisai said:

Most chassis come assembled. Check the manual.

 

The only part that this resembles to me is the power supply mount, but look for additional holes in the chassis, sometimes parts are for optional equipment like fans RGB mounts, and so forth.

Those are too fat and aggressive for a psu, 

 

as said above, those are fan screws.

[Kisai]

6 hours ago, scuff gang said:

Those are too fat and aggressive for a psu, 

 

as said above, those are fan screws.

For which though?  The last two chassis I have, the fans were already mounted in the chassis, and when I replaced them, the screws were a completely different length (27mm) and thickness.

[Letgomyleghoe]

5 hours ago, Kisai said:

The last two chassis I have, the fans were already mounted in the chassis, and when I replaced them, the screws were a completely different length (27mm) and thickness.

That could be specific to the fan, a lot of cases don’t come with fans installed, I assume those longer screws were for an aio.

 

Spoiler

Aio screw

Spoiler

Fan screw

I

Spoiler

Psu screw

So the main difference between these is that fan screw is self tapping, so it can dig into the fan material and hold it into place.

 

the aio screw is long and not self tapping, so I can reach through the fan and screw into the threads on the aio.

 

the psu screw is short and not self tapping so that it can just reach through the chassis into the threaded holes of the psu.

the screw in the ops image is self tapping and has a flat head, I’m 99% sure it’s a fan screw.