Radio Shack project box standoffs

Discussion in 'General Electronics Chat' started by jaygatsby, Dec 28, 2011.

  1. jaygatsby

    Thread Starter New Member

    Nov 23, 2011
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    The standoffs in a project box I'm going to use are too close to the top of the box -- I don't see screw threads inside the standoffs so I think I may just cut them down a quarter inch. Has anyone tried this before? I want to make sure I'm not going to render the plastic built-in standoffs inoperable...

    Thank you
     
  2. SgtWookie

    Expert

    Jul 17, 2007
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    I don't know how deep the holes in the standoffs go.

    Check the depth using a piece of wire or something before you cut them off. It will be a lot easier to drill them deeper with holes in them, than if the holes are sawed off.
     
  3. jaygatsby

    Thread Starter New Member

    Nov 23, 2011
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    Good point, I'll check the depth. Thanks. How do the screws actually 'attach' to the standoffs? Do they create grooves the first time they are screwed in? If that's the case then I should be able to cut down the standoffs, if they are deep enough.
     
  4. Wendy

    Moderator

    Mar 24, 2008
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    I like the little slides built into these boxes. Cut the board stock to the right width and it slides right in. You didn't mention the size of the box, I've drawn a couple of them as for my PaintCAD package.

    [​IMG]

    I've used the little standoffs too, they are included in the drawing. I cut a machine screw down to ¼" insertion, then let it tap the plastic. Never had any problem with it. I don't remember if it was a #4 or a #6 screw, I keep plenty of both.

    These are blank drawings. When I need to lay out a box I start with this and use it to figure where the holes will need cut, along with their shapes. I also use it to make sure everything will fit before I start cutting, it is always a pain to find two parts are overlapping, meaning you either start over with another box or leave an ugly hole after you re-lay it out.
     
  5. SgtWookie

    Expert

    Jul 17, 2007
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    Yes, the screws cut the threads when they are installed. They're like sheet metal screws.
     
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  6. jaygatsby

    Thread Starter New Member

    Nov 23, 2011
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    Does this mean that the screws are not intended for removal after installation?
     
  7. Wendy

    Moderator

    Mar 24, 2008
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    Because of the small depth of insertion you need a fine pitch thread, not a cutting thread like wood or metal screws. The plastic is very soft, so any metal will cut into it with ease. A #6/32 is 32 threads per inch, you will get 8 threads into that hole.

    You can remove these screws, but when you want to tighten them, don't. Remember the plastic is soft, just bottom them down without torque.

    The primary lid screw are deep, but the plastic is still soft. I've been known to use two ton epoxy on a tooth pick to fill in cracks and let it mostly cure when it happens. You can buy replacement screws from the hardware store.
     
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