4mm Allen Nut Hot Rod Truss Rod

4.5
  • 97 Reviews
  • Write a review

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

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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
+

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
+
Quantity Discount Prices apply when you buy multiples of the same item number.
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Quantity: 20

Details

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.


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)

Ratings & Reviews

4mm Allen Nut Hot Rod Truss Rod

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4.5
  • Based on 97 Reviews
Displaying 7 of 10 1 2 3 4 5 6 7 8 9 10
Write a review
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.

5.0

Hot Rod

By
(Customer's Reviews)


This Hot Rod is perfect for my work! Can't wait to see the final result.

5.0

Easy to install and works great

By
(Customer's Reviews)


I've used these in several guitars and basses. They are far superior to the traditional Gibson style truss rod setup. For one, they install easy - just cut the flat channel, and pop it in. No top filler stick is required. No cutting, tapping of threads or peening and anchor nut. They adjust upbow and backbow, and respond quickly to just a slight turn of the nut. Well worth the few extra dollars. They are a bit deep, so pay close attention when shaping your neck in the erea below the nut.

4.0

Pretty straight forward

By
(Customer's Reviews)


Nice sturdy rod and very easy to install. The only minor scruple I have is that the adjustment nut gained a bit of surface rust fairly quickly. Other than that it is a great product, happy to have used it

5.0

Easy to install

By
(Customer's Reviews)


These are not only high quality but much easier to install than conventional truss rods. And they adjust both ways, can't ask for a better product.

5.0

4mm Allen Nut Hot Rod

By
(Customer's Reviews)


I couldn't be more pleased. The installation of the truss rod & carbon fiber rods was as simple as it could possibly be when used with the corresponding router bits. I will be able to show my customers my commitment to high quality in the instruments I build by the use of these products provided by Stew-Mac. Thanks, I haven't been disappointed with any product I've purchased from Stew-Mac yet. Thanks, "Doc" DiLorenzo guitars & basses

4.0

Good truss rod

By
(Customer's Reviews)


I installed this Hot Rod truss rod in my guitar neck and it fits correctly, thanks for the instruction note delivered with it

5.0

I love this rod

By
(Customer's Reviews)


I use this rod in all of my guitars and if I rebuild a neck this is the rod I use.

Displaying 7 of 10
1 2 3 4 5 6 7 8 9 10


Shown on page 74 of our latest catalog.
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