I have an IKEA IVAR pine cabinet, the 80x50x83cm version - like the cabinet here.

I have installed it into IKEA IVAR side units, 50x226cm - like the side units here.

Here are the assembly instructions.

The side units are over 15 years old, which may explain the following problem:

There are supports which plug into holes in the uprights and have a protruding part which contacts the cabinet. The supports go on the top and bottom of the cabinet. There is a hole in the protruding part for a machine screw which screws into a hole in the cabinet to steady it. (See pages 16, 17 and 18 in the assembly instructions.)

The cabinet is properly seated on the bottom supports, and screwed in correctly. However, when it is properly seated on the bottom supports, there is a 3mm vertical gap between the protruding part of the top support and the top of the cabinet. The top machine screw is then too short to properly screw into the cabinet.

I phoned IKEA. Their suggestion was to order new uprights. I would like to avoid that.

  • Is it a reasonable solution to buy new, longer, machine screws (14mm) and use a 3mm stack of washers to fill the gap between the support and the cabinet?
  • The metal washers which fit the British Standard for an M4 machine screw are 0.8 mm in depth. I’ve found nylon washers which are 1mm in depth. How should I arrange my washers so they fill up the space underneath the support fully? Can I mix washer types? (I’m not sure 3mm is an exact measurement.)

The part numbers in question are:

  • 103887 for the supports
  • 100404 for the screws

The IKEA parts catalogue, which gives the dimensions of individual parts, is available here: http://www.icomp.webcms.se/index.cfm

  • 103887 is not in their catalogue :
    – Jasen
    Oct 3, 2019 at 21:26
  • After 15 years, are you sure the cabinets are still vertical? Maybe all you need is a shim or two on the floor (or turn the adjustable screw feet if it has 'em) to square the cabinet back up and everything will go back to hunky-dory.
    – FreeMan
    Oct 26, 2020 at 11:35

2 Answers 2


washers and longer screws sound like a good solution.

Mixing washers of different types should not be a problem as they are not going into a wet location.

If the standard washers are not the right thickness shims (thin washers) can be cut from the side of soft-drink (or beer) cans using scissors. be careful the cut edges are very sharp.

  • Both metal and nylon washers are usually available in different thicknesses as well as different ID & OD sizes - no need to cut up cans unless you're really into that sort of thing. You may have to go to a hardware store instead of a big-box "home improvement" store. In the US that would be a place like Granger instead of Lowe's, but based on the usage of mm in the OP, I'd presume the poster is not in the US.
    – FreeMan
    Nov 1, 2019 at 17:46

I would drill new holes in the upright so the top bracket is properly positioned. Your plan for washers would work but I don't think it would look as good.

  • 1
    the holes would likley overlap the existing holes. that could make it weaker.
    – Jasen
    Oct 2, 2019 at 4:55

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