HDD screws?

[YikesandIkes]

So I just realized that I have screwed my HDD in with the wrong screws, but I cannot find the ones that are supposed to screw them in(I believe the PSU screws are) Instead I used a smaller headed screw but it still screws into the HDD and isn't loose and it screws in and gives tension to the point where it will no longer screw in(unless I try super hard,but I know not to do that because overtightening is not good.) is it fine to have the HDD in with these screws or does it specifically have to be the hexagon headed ones(Im not talking about screwing it in from the side, rather the bottom because my HDD hangs face down in my case)

[mariushm]

Majority of screws in a computer are two varieties:

 

UNC 6-32 (imperial threading) - hard drives, majority of motherboard standoffs and screws, screw to lock extension cards to case, psu screws

 

M3 (metric 3) - used to screw optical drives and other 5.25" to case.

 

The screws for locking VGA connectors, DVI, joystick are UNC 4-40 (finer thread)

 

An M3 screw will not screw into a 6-32 hole, it will slip.

A 6-32 screw won't screw inside a M3 hole (too small diameter)

[YuppityYap]

17 minutes ago, mariushm said:

Majority of screws in a computer are two varieties:

 

UNC 6-32 (imperial threading) - hard drives, majority of motherboard standoffs and screws, screw to lock extension cards to case, psu screws

 

M3 (metric 3) - used to screw optical drives and other 5.25" to case.

 

The screws for locking VGA connectors, DVI, joystick are UNC 4-40 (finer thread)

 

An M3 screw will not screw into a 6-32 hole, it will slip.

A 6-32 screw won't screw inside a M3 hole (too small diameter)

it will slip? do you mean strip? 

[mariushm]

You could take the M3 screw and push it inside the 6-32 hole and not "catch" the thread if you trie to screw it with a screwdriver. The 6-32 thread is too coarse and hole is too wide.

If you screw a 6-32 in a M3 hole, you'll damage the threading (depending on material) of the m3 hole because 6-32 is too thick.