the HDD is a yankee invention and uses
Imperial screw sizes..
INCHES, is that. not METRIC.
so lost the others screws from other HDD removed? (story)
the screws must not be too long or you damage the HDD. ok?
rule1 stated (1/4" max? 6mm long)
they are #6-32 screws (#6 and 32 threads per inch)
see that word inch that is greengo yankee imperial sizes.
but other screws in a PC are metric, but not HDD and not PSU.
a
Toshiba's 3.5-inch P300 Desktop PC Hard Drive
if you want I can link the data sheet to it.
from makers web site in Japan. oops the silly manuals skip this fact, my guess is it will state (hidden) complies to ATX spec,
here is USA data sheet that answers this question
see lower page , words, 6-32UNC and the 0.25" inch LIMIT
note too, the 0.188" side limits on penetrations, ok?
https://www.techpowerup.com/forums/threads/pc-component-dimensions.157239/
the DVD and floppy drives are metric and are japan inventions.
but HDD is ours. USA (Seagate top of the heap) IMO
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