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4mm Allen Nut Hot Rod Truss Rod

4.5
  • 129 Reviews
  • Write a review
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12-1/4" overall length

Item # 2550
In stock, ready to ship!

$16.58

6 or more $14.42
12 or more $13.60
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14-1/4" overall length

Item # 2551
In stock, ready to ship!

$16.79

6 or more $14.61
12 or more $13.77
+

18" overall length

Item # 2552
Due 1+ month
Email when in stock

$17.84

6 or more $15.52
12 or more $14.63

24" overall length

Item # 2553
In stock, ready to ship!

$22.04

6 or more $19.17
12 or more $18.07
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4mm Allen Nut Hot Rod Truss Rod

About This Item

A smaller 4mm (5/32") Allen nut for most instruments. Smooth two-way action corrects upbow and backbow, giving complete control over the neck.

Easy to install. The Hot Rod® fits in a straight channel. For proper operation, this truss rod must be installed so that the active rod (the rod with the adjustment nut) is below the passive rod. A wooden filler stick is not required.

Smooth 2-way action with superior strength for stubborn necks.
Our Hot Rod neck adjustment system features twin rods in threaded brass collars. The stainless steel active rod turns for smooth neck alignment, with 2-way action to correct upbow and backbow.

The Hot Rod requires an access cavity for the adjustment nut, and a straight 7/32"-wide x 7/16"-deep slot (measured from the bottom of the fretboard) for installation.

Pick the Hot Rod Truss Rod size you'll need:
(overall length includes the nut)

Instrument
Resonator guitar
Acoustic guitar with 12th fret at the body
Acoustic guitar with 14th fret at the body
Electric guitar
Banjo
Bass
Size
12-1/4"
12-1/4"
14-1/4"
18"
18"
24"

We've designed the Router Bit for Hot Rod Truss Rods especially for routing your neck to fit our truss rods.


Instructions

Product Instructions

Hot Rod Adjustable Truss Rods

Installation and adjustment instructions for Hot Rod Adjustable Truss Rod.

    • Item #
    • Weight
    • 2550
    • 0.1970 lbs. (0.09 kg)
    • 2551
    • 0.2320 lbs. (0.11 kg)
    • 2552
    • 0.2960 lbs. (0.13 kg)
    • 2553
    • 0.3850 lbs. (0.17 kg)

Customer Reviews

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4.5
  • 4.47 average rating from 129 reviews
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3.0

ok product

By

Verified Buyer


Not super thrilled with these. Needs a thinner slot and also deeper than normal. Also possible to install these wrong if not paying attention. Due to the extra deep slot required and quirkiness, I usually get a truss rod from another supplier. Seriously if you are going for a thin neck I'd avoid this. Also prepare to buy the new router bit.

5.0

Used in 3/4 scale guitar

By

Verified Buyer


Used two of these in 3/4 scale electrics. Have used the spoke nut hot rods in the last ~20 guitars and they have worked well. Can't think of a reason to try anything else but I needed something shorter. Worked great!

5.0

True Trussrod

By

Verified Buyer


First one I've ever replaced, job went well!

5.0

One of the best rods on the market

By

Verified Buyer


The functionality of the rod is unparalleled. However, when I received mine, there was some rust and corrosion on the two brass blocks and the adjusting nut. A few minutes with some 320-grit sandpaper took care of it and brought it back to a nice sheen. It's not enough to detract a star from the rating, but as the adjusting nut would be visible in my finished product, it's worth noting. I bought it with the router bit and routed my truss rod slot without any hassle.

4.0

A tough one to review

By

Verified Buyer


Ive used lots of these rods of different lengths. They all work great and still do. But then on final setup of a maple/cocobolo neck with custom inlay work I used a 4mm Allen key and gave it a turn to bring it up to tension (since these are floating rods i.e. they don't glue to anything) and the head twisted right off. Of course StewMac's customer service was fantastic and they immediately shipped me a replacement with their apologies. I was able to get the broken rod out and put a new one in but I had to drill a hole in the heel of the custom neck. I guess the lesson I learned is to make sure they are functioning fully before you install them cause once they're in, they're a bear to get out. I pretty sure I just got a bad rod, which is bound to happen with any product. But I can't bring myself to give it a 5th star.

3.0

Ok

By

Verified Buyer


They really are a little short to get the full neck set needed. I haven't had one break as warned but just started using them. We'll see if I continue with them.

4.0

Ok

By

Verified Buyer


works OK but it is a little high and you can't make your neck as thin as you would like. Other than that it is an excellent device.

4.0

Good deal

By

Verified Buyer


Nice trust rod, almost too easy to drop in a corresponding pre-made neck. Only needed to oversize the slot a bit (little over a 64th) for the allenkey insert on the rod.

5.0

works perfect

By

Verified Buyer


good product, well designed, easy to install pending your channel routing.

5.0

Hot Rod Truss Rod

By

Verified Buyer


Wonderful, always work well!

Displaying 5 of 13
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StewMac PDF Catalog, page 76 See 4mm Allen Nut Hot Rod Truss Rod
on page 76 of our StewMac Digital Catalog



  • Hot Rod® is a registered trademark of Stewart-MacDonald Manufacturing Company, Inc.