tap and die set, but what size(s)?

[SarverSystems]

I'm looking to get a small tap and die set to tap some holes for standard-sized computer screws.

The problem is, what size are they?
Search found nothing for "screw sizes" believe it or not.

 

[penguin]

Most cases are 6-32.
Lian Li uses 3mm metric threads (don't remember the pitch off the top of my head)

 

[Derf]

Wikipedia page on computer screw sizes:
http://en.wikipedia.org/wiki/Computer_case_screws

 

[ATLPIMP]

Lian Li uses 3mm metric threads (don't remember the pitch off the top of my head)

3 x 0.5 mm

OP, you're only going to need a few sizes to cover 99% of cases. They (quality - all the major companies, i.e. Snap-On, Matco, etc..., source their parts from Irwin) don't make kits small (in amount of pcs.) enough to warrant for you. Best to just buy the parts you need.

http://buy1.snapon.com/catalog/tools.asp?tool=all&Group_ID=1164&store=snapon-store

FWIW, the 117-piece set set me back $420.

 

[SarverSystems]

I'll order the taps that fit into a handle. We have them at work. Thanks muchly for the info.