Truss Rod Adjustment: Follow up Part 2


This is the 3rd truss rod adjustment post I’ve made. It’s going to be very short and sweet. After much sleuthing I think I found the perfect washer. It looks very similar to the spacers used on the Stewart McDonald Truss Rod Rescue Kit. As you may recall I had a very difficult time finding a properly sized washer. The inside and outside diameters have to be exact.

The best solution I could find at the time was a metric lock washer bent flat. You have to stack several washers to get the right height. The footprint against the wood is a bit small in surface area. The stacking isn’t perfectly aligned… You get the idea.

Because I was also looking for some computer case stand-offs I happened upon a whole other category of standoff and spacers. And from an online industrial supplier I found what I believe are perfectly sized spacers. Here are the specs and where I got them.

Round Spacer, Clear Hole, 18-8 Stainless Steel, Screw Size #10, Inside Dia 0.192 In, Outside Dia 3/8 In, Length 3/16 In

Whatever you use as a washer here are two notes of caution:

  • You may never be able to get it back out. Make sure whatever you try out either has lots of space or you are willing to commit to it. I inserted two of these perfectly sized spacers and had a super hard time getting the second one out.
  • Make sure the material does not compress. I put a very tough nylon spacer in (as seen above). It compressed changing my relief and was a total nightmare to remove.


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7 Responses to Truss Rod Adjustment: Follow up Part 2

  1. Can I simply say what a comfort to uncover an individual who actually understands what they’re discussing on the web. You definitely understand how to bring an issue to light and make it important. More and more people ought to look at this and understand this side of the story. I was surprised you are not more popular since you most certainly possess the gift.

  2. cporro says:

    thanks. i agree 100%. : )

  3. AC says:

    Do you sell these? I’m in the UK and anything like this is hard to come by. Does it save taking out the insert to get to the top of the truss rod?

  4. cporro says:

    the washers? no. i don’t sell anything except audio services. : ) the link is in the post right? i have another post on removing the plug. washers do not save you that step.

  5. AC says:

    For a moment there I thought that they might.

  6. brian says:

    At home depot in their drawer section I found an aluminum #10 spacer that closely matches the diameter of my hex key nut..43 cents. Length is 1/4″. I didn’t grab that one because I didn’t know how well aluminum would hold up to the pressure of the truss rod. Any ideas?

    I just snagged some #10 stainless lock washers and bent them straight.

  7. cporro says:

    i think aluminum would work fine. it just sits there under some compression. it’s the perfect fit that drove me nuts. : )

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