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4mm Allen Nut Hot Rod Truss Rod

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

Item # 2550
Due 5-7 days
Email when in stock

$15.79

6 or more $13.74
12 or more $12.95
+

14-1/4" overall length

Item # 2551
In stock, ready to ship!

$15.99

6 or more $13.91
12 or more $13.11
+

18" overall length

Item # 2552
In stock, ready to ship!

$16.99

6 or more $14.78
12 or more $13.93
+

24" overall length

Item # 2553
In stock, ready to ship!

$20.99

6 or more $18.26
12 or more $17.21
+
 
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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)

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4.5
  • 4.44 average rating from 117 reviews
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4.0

Works fine but not necessarily a drop-in replacement.

By
(Customer's Reviews)


I ordered one with the 4mm Allen nut to replace the broken rod in a Seagull acoustic. I had to make the slot a little deeper as this rod is slightly taller than the original. I also found out that the adjusting nut lies a lot deeper into the body than the original, so it needs a long Allen wrench to adjust it. I thought about having the old longer adjusting nut welded on to extend it to the original position but decided against it because there was a possibility the threads might might weld together as well. (It happened when I tried getting the old rod rewelded).

Other than that, once installed it worked well, double action rods need a lot less turning of the adjusting nut, with less effort, to have an effect. Had to wait a week or so for it to be in stock but once in stock delivery was prompt as always.

5.0

Positive first experience

By
(Customer's Reviews)


This is my first time installing the Hot Rods. Up until now I've been using a fairly typical welded two way truss rod, but had heard many good things about these Hot Rods.
Installation was a bit fiddly compared to my previous installs, but I think that comes down more to the fact I didn't have the correct size router bit, so I made do with a 5mm and made two passes.
They require a deeper slot than I'm used to, which initially concerned me, but I don't see that it will be a problem unless a super slim profile is required (which I don't do)
Overall they seem to be well made and work smoothly

5.0

Easy to Use and Install If You Know What You're Doing

By
(Customer's Reviews)


I bought two of these for a few guitars I'm building from scratch. I have installed one so far in a fender-style neck. The rod works great, especially when installed in a truss rod cavity routed by the specialized hot rod router bit. I am very pleased with my purchase.

5.0

4mm Allen Nut Hot Rod Truss Rod

By
(Customer's Reviews)


I
I've used these rods for a long time, no failures.
what more could you ask for?.

5.0

Wouldn't build without them.

By
(Customer's Reviews)


I have used several of the allen headed Hot Rod truss rods and they work extremely well.
I would highly recommend getting the router bit designed for them because the better they fit the slot the better the truss rods work.

5.0

The Best !

By
(Customer's Reviews)


really good quality ! the best on the market
I use Them for all my builds !

5.0

Truss rod

By
(Customer's Reviews)


Building a new guitar but haven't installed the truss rod yet...looks like a quality part.

5.0

Good quality truss Rod.

By
(Customer's Reviews)


I like using the Hot Rod Truss Rod with the 4mm Allen Nut. I can make a small access hole by extending the truss rod channel buy about an 1'' and have enough room to use a allen wrench with a ball end for easy access. I would recommend using the longest truss rod as possible to cover the entire fret board. It takes very little pressure to make an adjustment.

4.0

Does the job

By
(Customer's Reviews)


This isn't my favorite truss rod, but it does the job. It isn't as stiff as I prefer, but I've used it occasionally and haven't had one fail.

5.0

Truss rods

By
(Customer's Reviews)


I use these on acoustic and electric and they work great! Easy to install, have not had any issues to date!

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StewMac PDF Catalog, page 74 See 4mm Allen Nut Hot Rod Truss Rod
on page 74 of our StewMac Catalog PDF

13MB File

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