1960s Eko 995 Broken Truss Rod Nut

My last post was about a 1960s Eko 995 bass that made its way into my hands (link). My intent was to restore it to playable condition.

I thought it would be pretty straight forward. Clean it up, rewire it, fabricate a bridge and pickup mounting ring, and string it up. Well, that isn’t going to be the case.

Jaime was all excited to get the bass cleaned up this weekend. We got all setup, and started pulling parts. First to go was the truss rod access cover. Three screws later, and this project is pretty well over, for now.

It turns out that a piece of the truss rod broke off in the nut when someone tried to adjust it. Here is what it looks like:

If you look closely, you can see a small brass plate where the wider portion of the nut sits. The broken rod is inset the distance of the thin part of the nut, obviously.

It can be fixed. I can remove the brass plate (someone already tried, I can succeed). Stewmac sells a tool that allows you to drill around the truss rod so you can re-thread it. Unfortunately, the tool costs more than the guitar would be worth.

And then, I would have to have a custom truss rod nut fabricated, which I cannot imagine would be cheap.

Anyone have any ideas? We have set an artificial deadline of October 2015 for having a repair strategy. If I can’t figure out a way to fix it by then, it will be parted out on Ebay with the proceeds used to buy something musical for Jaime.

3 thoughts on “1960s Eko 995 Broken Truss Rod Nut

  1. Pingback: The Gull Reef Club » Sometimes You Feel Like Nut

  2. Would you happen to know what size the screws are on the EKO truss rod nut cover you are working on.
    I need to replace a couple of the screws but don’t know what size to get.

    Thank you in advance if you have time to answer my email.

    p.s. I have thought about your problem and what you need is a piece of stainless steel pipe that can be threaded inside to fit the truss rod. I would assume the truss rod is threaded the full length. A good machinist could make you a piece about 2 inches long. Then you could drill four holes around the top and thread it all on the truss rod. You would end up with the same adjustment procedure but at least you would have one.

    i.e. You need to have a machinist make you a copy of the truss rod nut only about one inch longer to allow for the broken piece.

  3. Hi there,

    I just happened to have the neck, a screwdriver, and my digital calipers all within reach.

    The charts say it is the head style is “oval.” The overall length is 10.55mm. The thread diameter is 1.99mm. The head diameter is 4.06mm. It is a flathead screw.

    Thanks for the suggestion on the truss rod. I’ll give it some thought!


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