Screws!

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mib5150
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Screws!

Postby mib5150 » Sat Nov 28, 2009 4:02 pm

Hi, a friend of mine gave me a almost completely disassembled TT the other day, and I also have an ST missing all screws and an ST with slotted screws. This puts me in the position of needing new screws, preferably exactly the same that we should find in the Atari computers.

Tho, I don't know anything about screw terminology... I guess I visit the hardware store to buy them, but what shall I ask for to get the right stuff? Are there any form of standards for screws?

Anyone who knows how to get the right screws, instead of getting screwed? ;)

/ Lars (Who live in Sweden btw, so don't recommend like British or American stores, since I rarely get to visit them at all) ;)

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wongck
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Re: Screws!

Postby wongck » Sun Nov 29, 2009 3:40 am

If you are not too worried about the threading eating into the plastic, I would say any screws of the approximate diameter of the hold will do.
Since it is the plastic that is holding the screws, and the screw thread can "eat" into the plastic.
Just make sure that the screw thread do not over-thread it.
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1024MAK
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Re: Screws!

Postby 1024MAK » Sun Nov 29, 2009 9:06 pm

There are many different thread types used throughout the world. However, most screws used in the developed countries in "the west" in the last 25 years conform to "standards" that are either international standards (the metric sizes), or former British or American "standards". Metric sizes should be readily available. The self tapping screws are available in the UK, but I am not sure about elsewhere.

Anyway here are the details of some of the screw used on one of my machines.

Atari 520 STFM

Case screws
Threaded section 9.6mm/0.38in, total length 12mm/0.47in, thread outside dia 2.9mm/0.11in.
The nearest type that I have found are "self tapping screws", size "No.4" length 0.5in (so it says on the packet, but when measured is approx 0.54in), but these are slightly too long so either cut or file them down, or use a M3 size washer under the head of the screw.

PSU mounting screws
These hold the PCB to the bottom plastic case, and also the ones that hold the PSU to the bottom plastic case through the PCB):-
Threaded section 7.7mm/0.3in, total length 9.8mm/0.38in, thread outside dia 3mm/0.11in.
Again use "self tapping screws", size "No.4". If you can find ones that are the right length, or cut down some of the 0.5in ones.

Metalwork screws
Machine screws that hold the metalwork covers (such as the metalwork over the PSU) to the main PCB metalwork:-
Metric type M3, threaded section 4.7mm, total length 7mm, thread outside dia 2.9mm.

There are some other odd sizes, but I did not need to replace these so I did not measure them.

Hope this helps :cheers:
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Desty
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Re: Screws!

Postby Desty » Wed Dec 02, 2009 12:32 am

1024MAK wrote:Anyway here are the details of some of the screw used on one of my machines.

[...]

There are some other odd sizes, but I did not need to replace these so I did not measure them.

Hope this helps :cheers:

That's excellent info - could you put it into the Wiki for posterity/findability's sake? :thumbs:
tá'n poc ar buile!

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Methanoid
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Re: Screws!

Postby Methanoid » Sun Jun 03, 2018 6:27 pm

1024MAK wrote:There are many different thread types used throughout the world. However, most screws used in the developed countries in "the west" in the last 25 years conform to "standards" that are either international standards (the metric sizes), or former British or American "standards". Metric sizes should be readily available. The self tapping screws are available in the UK, but I am not sure about elsewhere.

Anyway here are the details of some of the screw used on one of my machines.

{SNIP}

Hope this helps :cheers:


It helps.. thank you.. I found both my STs were screw less in the attic and only found ONE set of screws :(

Chandler
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Re: Screws!

Postby Chandler » Mon Jun 04, 2018 11:52 am

I have case screws for the ST/STE/Mega/Mega STE and TT

Just PM me if anyone is interested

KLund1
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Re: Screws!

Postby KLund1 » Mon Jun 04, 2018 9:59 pm

Be careful of the screws at the front of the case. If they are just a bit to long, you will get a bump on the top of the case, as the screw pushes up on the case plastic. Worse they might pop through. I use 3/8" screws for the front.
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