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4mm Allen Nut Hot Rod Truss Rod

4.5
  • 104 Reviews
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12-1/4" overall length

Item # 2550
In stock, ready to ship!

$15.79

6 or more $13.74
12 or more $12.95
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14-1/4" overall length

Item # 2551
In stock, ready to ship!

$15.99

6 or more $13.91
12 or more $13.11
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18" overall length

Item # 2552
In stock, ready to ship!

$16.99

6 or more $14.78
12 or more $13.93
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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
    • 0.197 lbs. (0.09 kg)
    • 2551
    • 0.232 lbs. (0.11 kg)
    • 2552
    • 0.296 lbs. (0.13 kg)
    • 2553
    • 0.385 lbs. (0.17 kg)

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4.5
  • 4.45 average rating from 104 reviews
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5.0

Fantastic Truss Rods

By
(Customer's Reviews)


I use these in every custom guitar and bass I make. They are effortless to install using the correct router bit, and provide tremendous control over the neck.

By using two carbon fiber reinforcements on either side of the truss rod, even a 28.5" scale 8-string can be adjusted easily.

5.0

installing truss rods

By
(Customer's Reviews)


I am very pleased with the easy installation and quality truss rodss

5.0

short scale telecaster

By
(Customer's Reviews)


I have used your hot rod truss rods for more than ten constructions and repairs during the last two years. It works perfectly both in guitars and basses. Highly recommended. Greetings from Athens. Happy new year.

4.0

two way truss rods

By
(Customer's Reviews)


great quality but the depths of these rods are a little to deep be careful if your planning on a skinny neck would like to see these rods with a flat bar on the top rather than round to decrease the depth of the slot needed

5.0

Love these rods!

By
(Customer's Reviews)


I used to make my own 18" truss rods. I bought a couple of 6' stainless steel rods. I bought right and left handed taps and dies. I had my godfather make some anchors with right and left hand threads. They work great. But, it's a lot of work to cut your own threads and Dremel for the achors. Not to mention welding my own 1/4" hex adjusting nut.

These Stewmac rods are fantastic. Make sure you buy the router bit specifically designed to fit these rods. They go in soooo easily and the strength and evenness of the curve is great. I don't make truss rods any more. There's no need when they cost less than $16.

5.0

Works Very Well

By
(Customer's Reviews)


A very powerful adjustment. Suggest full bedding with compliant silicon calk rather th.an just dabs at both ends as directed to minimize rattles.

2.0

one out of 2 ain't bad :$

By
(Customer's Reviews)


Just built my 2nd guitar using these truss rods, using a ball end allen wrench (as suggested on angle) has chewed the inside of the nut completely!! This metal in the nut must be really soft stuff, I barely got a 1/4 turn on my truss rod & an almost finished guitar is now screwed :(

5.0

Great Product

By
(Customer's Reviews)


I use the Hot Rod in all my custom guitars. It's strong, it can correct even the worst upbow/backbow with no signs of breaking. Very highly recommended.

5.0

Works great

By
(Customer's Reviews)


Routing out the channel for this was easy. Adjusting the neck relief after the guitar was complete went well. The instructions are clear and get the job done.

1.0

4mm allen head hot rod

By
(Customer's Reviews)


You'll likely need the special width router bit to get the exact slot width. I got close with two router passes of a 3/16" bit but it was a trick to set up. Got it installed and put the wrench in the socket just to loosen it up and the end broke off ! I'm quite disappointed and I can't return it now cuz it's stuck in the neck. Wary of trying this again, I prefer the old fashioned Gibson type for reliability.

Displaying 7 of 11
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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

12MB File

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