Need help with which screws to use

[Jaga848]

Hello! Soon I'll be building my first PC, and I'm really confused about the screws I should use and where to use them and I can't find a proper answer online. Here are the screws that came with my case, which type goes where? (Note: there are more screws of the same type in the lower left corner, they just couldn't fit in the picture)

http://imgur.com/a/3xuqK

 

[Guest]

Hello! Soon I'll be building my first PC, and I'm really confused about the screws I should use and where to use them and I can't find a proper answer online. Here are the screws that came with my case, which type goes where? (Note: there are more screws of the same type in the lower left corner, they just couldn't fit in the picture)

http://imgur.com/a/3xuqK

The ones on the top right should not be used. The others are for wherever they fit. Where you put the motherboard, there should be raised female threads. The screws that fit there go there, The others are for hard-drive, PSU, SSD, etc. Finally there are some to hold the cover.

If your case didn't come with a manual, just try and find which one works. There are two standard screw thread sizes, the coarser is for the motherboard, psu, 3.5" HDD. The thinner tread is for SSD, 2.5" HDD.

The longer screws are usually to hold an HDD through a thick HDD cage.

Don't use any screw that have pointed ends.

 

[little_me]

-Top left, usually either for case cover, psu, hard disks or motherboard (usually not for SSD's) I myself use these as hard disk screws myself due to smaller head so that if room is tight, it fits easier.
-Top right, usually meant for attaching something to predrilled plastic hole due to sharp point. possibly some fan attachment, no real use otherwise.
-Middle right, long screws are.... not really meant for anything "standard" like motherboard, case cover, disks, psu or anything like that. unless there is some special need for them, they are most likely not used for anything, case manual might tell where they are supposed for be used.
-Bottom left, metric screws, usually for cd/dvd drives and ssd disks.
-Bottom right, case cover, psu, hard disk or motherboard, I usually use these for motherboard but... it will physically work just as well as top left type.

TLDR; basically what Andy Chow said, except mentioning cd/dvd drive

Basically that is about it. do not use the bottom left on motherboard, they will kind of slip into the standoffs but due to being just bit too small, cannot be screwed out since they slip but have enough traction to kind of get stuck there, possibly needing more tricks to get out.
This will get more complicated if you have motherboard installed.