Author Topic: What types of screws and anchors do sandwich cases use?  (Read 1757 times)

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Offline spacewolf

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  • Posts: 16
What types of screws and anchors do sandwich cases use?
« on: Tue, 28 November 2017, 15:56:05 »
Hey

I'm starting to design a sandwich case and I was gonna use M2 screws but I dont know if that's right. I also have no idea how to find anchors.

Anyone know what I'm talking about? And where to find them? (US)

Thanks

SW

Offline emenelopee

  • Posts: 398
  • *klomp klomp klomp* I step on your house 🦖
Re: What types of screws and anchors do sandwich cases use?
« Reply #1 on: Tue, 28 November 2017, 16:06:36 »
I use these in M2.5, though I only resorted to making a sandwich while I wait for my frame to arrive, and not really much of a sandwich as I'm just using two PCBs top and bottom, these as a spacer.

https://www.amazon.com/gp/product/B01MXSJXLO/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1

Not exactly what you're asking for but M2.5 is a good size.

Offline AuthenticDanger

  • Posts: 367
Re: What types of screws and anchors do sandwich cases use?
« Reply #2 on: Tue, 28 November 2017, 16:11:49 »
You're looking for "threaded standoffs"
F Keys belong on the left.

Offline spacewolf

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  • Posts: 16
Re: What types of screws and anchors do sandwich cases use?
« Reply #3 on: Tue, 28 November 2017, 16:29:29 »
Yeah. threaded standoffs seem like a decent option. I was just struggling to find one w/ a short enough male end.

I also just found these, which seem decent, but expensive. at least if i was gonna get them from here:

https://www.mcmaster.com/#94100a110/=1aggd0o


Offline spacewolf

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  • Posts: 16
Re: What types of screws and anchors do sandwich cases use?
« Reply #4 on: Tue, 28 November 2017, 18:49:25 »
I found a BUNCH of stuff to help me solve this problem. Answers below:

Low Profile flat HEX head screw:
https://www.mcmaster.com/#93070a073
Most expensive option

Pan Head Phillips screw:
https://www.mcmaster.com/#92005A128
Least expensive by a lot

Best anchor:
Press fit nut for plastic:
https://www.mcmaster.com/#94100A110
This will be really nice cause it'll sit nearly flush but still do the job.


Another option if I go w/ a slightly larger screw, is to use bumpers like these as feet:
https://www.mcmaster.com/#standard-bumpers/=1agi18v

or if I'm willing to thread the screw from the bottom and use the press fit nuts at the top:
https://www.mcmaster.com/#9540K12

so many options! thanks McMaster-Carr
« Last Edit: Tue, 28 November 2017, 18:51:13 by spacewolf »

Offline JohanAR

  • Posts: 71
  • Location: Sweden
Re: What types of screws and anchors do sandwich cases use?
« Reply #5 on: Wed, 29 November 2017, 05:17:50 »
I bought a box with several different lengths from banggood.com .It was cheap but long delivery time. If you know which length you need you can get them from keeb.io.