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Author Topic: Model F screws--what size are they? Anybody know?  (Read 2094 times)

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Offline vivalarevolución

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Model F screws--what size are they? Anybody know?
« on: Thu, 13 February 2014, 19:36:36 »
My Model F came with two screws that actually were Model M screws.  I'm wondering if anybody knows the exact screw size for screws that hold together the case of the Model F.
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Offline fohat.digs

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Re: Model F screws--what size are they? Anybody know?
« Reply #1 on: Thu, 13 February 2014, 19:49:42 »
Aren't they the same? 7/32"
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Offline E TwentyNine

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Re: Model F screws--what size are they? Anybody know?
« Reply #2 on: Thu, 13 February 2014, 20:34:43 »
Quote from: fohat.digs on Thu, 13 February 2014, 19:49:42
Aren't they the same? 7/32"

Model F AT is 1/4"
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Offline vivalarevolución

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Re: Model F screws--what size are they? Anybody know?
« Reply #3 on: Thu, 13 February 2014, 20:55:07 »
Oops, sorry for the Model F 122.  They are the same head size as the Model M, but the Model F screws have more threads.  The Model M screws will not stay tight in a Model F case.
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Offline fohat.digs

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Re: Model F screws--what size are they? Anybody know?
« Reply #4 on: Thu, 13 February 2014, 21:14:55 »
Quote from: prdlm2009 on Thu, 13 February 2014, 20:55:07
Oops, sorry for the Model F 122.  They are the same head size as the Model M, but the Model F screws have more threads.  The Model M screws will not stay tight in a Model F case.

That makes sense. Like everything on the Model M, they are cheaped-down and simple compared to the F. Model M screws just go into plastic and need rough threads, while the F has metal sleeves inset into plastic stems to receive machine screws.
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"However, even though I was born in the Mesozoic, I do know what anyone who wants to reach out to young people should say: Billionaires took your money. They took your chance to buy a home. They took your chance at a good education. They stole your opportunities. Billionaires took the things you want in life. If you really want those things, you have to take them back.
That's the message. That's the whole message. Say that every day, not just to reach America's frustrated young white men, but people of every age, race, and gender.
Late-stage capitalism is a wealth-concentration engine, focused on vacuuming up every dollar and putting it in as few hands as possible. Republicans are helping that vacuum suck.
How does a tiny fraction of the population get away with this? They do it by dividing the other 99% of Americans against themselves."
- Marc Sumner 2025-05-30

Offline vivalarevolución

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Re: Model F screws--what size are they? Anybody know?
« Reply #5 on: Fri, 14 February 2014, 06:19:16 »
Quote from: fohat.digs on Thu, 13 February 2014, 21:14:55
Quote from: prdlm2009 on Thu, 13 February 2014, 20:55:07
Oops, sorry for the Model F 122.  They are the same head size as the Model M, but the Model F screws have more threads.  The Model M screws will not stay tight in a Model F case.

That makes sense. Like everything on the Model M, they are cheaped-down and simple compared to the F. Model M screws just go into plastic and need rough threads, while the F has metal sleeves inset into plastic stems to receive machine screws.


Yea, and those Model M screws strip the metal sleeves on Model F case.  I'm worried that the correct screws will have trouble sitting correctly, if I ever find the right ones.
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Offline fohat.digs

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Re: Model F screws--what size are they? Anybody know?
« Reply #6 on: Fri, 14 February 2014, 11:45:28 »
The screws are metric, amazingly.

M4 - .7 x 14mm with an undersized hex head and flange. Home Depot sells M4-.7x12mm in either pan head Philips screw with a head about the same size as the original flange, or a hex bolt with a much larger head. The 12mm is a bit shorter than the original but should work OK.

I am glad that you brought this up, I needed a couple myself.

With luck, the new threads will re-mould the insides of the sleeves, at least partially.
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"However, even though I was born in the Mesozoic, I do know what anyone who wants to reach out to young people should say: Billionaires took your money. They took your chance to buy a home. They took your chance at a good education. They stole your opportunities. Billionaires took the things you want in life. If you really want those things, you have to take them back.
That's the message. That's the whole message. Say that every day, not just to reach America's frustrated young white men, but people of every age, race, and gender.
Late-stage capitalism is a wealth-concentration engine, focused on vacuuming up every dollar and putting it in as few hands as possible. Republicans are helping that vacuum suck.
How does a tiny fraction of the population get away with this? They do it by dividing the other 99% of Americans against themselves."
- Marc Sumner 2025-05-30

Offline vivalarevolución

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Re: Model F screws--what size are they? Anybody know?
« Reply #7 on: Fri, 14 February 2014, 16:56:08 »
Quote from: fohat.digs on Fri, 14 February 2014, 11:45:28
The screws are metric, amazingly.

M4 - .7 x 14mm with an undersized hex head and flange. Home Depot sells M4-.7x12mm in either pan head Philips screw with a head about the same size as the original flange, or a hex bolt with a much larger head. The 12mm is a bit shorter than the original but should work OK.

I am glad that you brought this up, I needed a couple myself.

With luck, the new threads will re-mould the insides of the sleeves, at least partially.

Thanks.  I would shoot out to the hardware store right now, but it's current Snowpocalypse, Part 4, out there right now, so I will wait until tomorrow.
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Offline semyorka

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Re: Model F screws--what size are they? Anybody know?
« Reply #8 on: Fri, 14 February 2014, 23:45:42 »
If you're buying new bolts that don't quite match the originals, I'd just get some M4 x 14mm cap screws from McMaster.  Something like ~$8 for 50 in 18-8 stainless steel.  They've got some nice black-oxide coated ones as well.

I can't imagine that the threads are damaged to the point that chasing them with a tap won't clean them up.
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Offline 0100010

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Re: Model F screws--what size are they? Anybody know?
« Reply #9 on: Sat, 18 October 2014, 19:09:48 »
Necro post.

4704 boards also use M4 x.07 screws on the case.
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