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What is the screw size for 3.5" floppy drives?



 
 
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  #1  
Old November 26th 17, 03:00 PM posted to alt.comp.hardware.pc-homebuilt
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Posts: 36
Default What is the screw size for 3.5" floppy drives?

Im adding a floppy drive to a computer that is about 10 years old and
never came with one. The tower case has a bay for that size drive, but I
dont have the screws. Hopefully my local hardware store will have them.
What size do I need? length, thread pitch, diameter, etc. Are they rated
as SAE or Metric?

If the hardware store dont have them, I will probably have to go to ebay
or something like that. We dont have anything around here for computer
parts stores.

  #2  
Old November 26th 17, 04:55 PM posted to alt.comp.hardware.pc-homebuilt
Paul[_28_]
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Posts: 1,467
Default What is the screw size for 3.5" floppy drives?

wrote:
Im adding a floppy drive to a computer that is about 10 years old and
never came with one. The tower case has a bay for that size drive, but I
dont have the screws. Hopefully my local hardware store will have them.
What size do I need? length, thread pitch, diameter, etc. Are they rated
as SAE or Metric?

If the hardware store dont have them, I will probably have to go to ebay
or something like that. We dont have anything around here for computer
parts stores.


Wikipedia has a few words to say.

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

I'm not very good at describing screws, so I'll
have to leave that to the Wikipedia people.

New computer cases come with a bag of screws - but
I haven't seen people selling those bags as a separate
item. One reason for not doing that, is the standoffs
in the bag (that go underneath the motherboard) are
custom to each computer case design. There can be dozens of
different styles and cutoff lengths. But the screws for
PCI slot covers, HDD, and your floppy, those are likely
to be common from one computer case bag to another.

And modern "screwless" computer cases, would not be
a good source of random hardware like that. They might
still have standoffs in a bag, but some computer cases
use sheet metal "bumps" as their standoffs, and the standoffs
are not a separate item on those. If I saw that in the
design, I would not buy that computer case. I only
buy cases with proper separate standoffs, so they
won't short out to something on the bottom of the
motherboard. The PCB has grounded "rings" for the
standoff to touch, but you don't want the standoff
contacting a capacitor located too close to the standoff
location. Separate standoffs can be shaped more precisely
than a "bump" standoff.

Paul
  #4  
Old November 27th 17, 03:53 AM posted to alt.comp.hardware.pc-homebuilt
VanguardLH[_2_]
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Posts: 1,453
Default What is the screw size for 3.5" floppy drives?

wrote:

Im adding a floppy drive to a computer that is about 10 years old and
never came with one. The tower case has a bay for that size drive, but I
dont have the screws. Hopefully my local hardware store will have them.
What size do I need? length, thread pitch, diameter, etc. Are they rated
as SAE or Metric?

If the hardware store dont have them, I will probably have to go to ebay
or something like that. We dont have anything around here for computer
parts stores.


It's just sheet metal. Use short self-tapping screws. Use a set of
drill bits to get the size of the hole, then get a self-tap screw that
is slightly bigger.

Another user noted the floppy drive's case uses M3 bolts. However,
without knowing your case and clearances, the head could interfere with
the case, drive cage, or other mechanics of the case. See if your
hardware store has M3 bolts with crown heads. The hardware store may
not have short screws (just long enough for screw to engage the drive
case and not extend inside). You'll need a wire cutter with the screw
holes to cut the screws to shorter length.

Or you could buy them somewhere already made for PC use, like at Newegg:

https://www.newegg.com/Product/Produ...9SIA9F93GK7360
(the screws are cheap but shipping is 10 times the cost)

You could hunt around eBay for the screws and with free shipping (and
might pick your country so there isn't month+ delay for customs), like:

http://tinyurl.com/ya9mlyua
 




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