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4mm Allen Nut Hot Rod Truss Rod

4.5
  • 122 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
+

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
In stock, ready to ship!

$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
  • 4.46 average rating from 122 reviews
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5.0

Purchase

By

Verified Buyer


Smooth transaction. Fast delivery.

5.0

Fast turnaround & great customer service

By

Verified Buyer


Every time I've shopped with StewMac, it's a great experience. If I have problems or questions, I can email them and respond typically within one day. Things get shipped out really quickly, so I'm not stuck waiting long for my supplies.

4.0

Good T/rod

By

Verified Buyer


very easy to install. I used many of these truss rods, only had to tweak one or two during installation

5.0

Outstanding Truss Rod

By

Verified Buyer


I have used many Hot Rods in my builds in recent years. They are very high quality and very effective when installed correctly. I have never received a bad one but always test them before installation to make sure the threaded parts are working and that the brazing is solid. Clamp the end in a soft jaw vise and turn the adjuster to make sure the rod curves up and back. I recommend using the available router bit and following the included instructions for trouble free operation.

5.0

Best yet

By

Verified Buyer


I use these in every bass neck I build. Easy to install and adjust. I highly recommend them.

5.0

Great truss rods

By

Verified Buyer


I love these and have used a few dozen of them now, mainly in banjos but also guitars. They're very strong, easy to adjust and quick to install-just a single pass with a router is all it takes. I have confidence that these truss rods will last and that my customers will be able to use them to adjust their necks for a long time.

1.0

dont buy this

By

Verified Buyer


I highly reccomend NOT buying this trussrod. After finishing a neck I tried to tighten the rod. After 1/4 turn I hard a "snap". Snapped the nut straight of. Well.. snapped of.. there is no sign it broke of, it just came loose. Hope I can still manage to solve this, or it will set me back hours...

Response from StewMac

We are very sorry to hear the nut on this truss rod broke after installation. We would definitely consider this a defective truss rod and we would be happy to replace it for you or offer a refund. I will send you an email regarding this right away and we can do our best to take care of you.

-Spencer, Customer Support.

5.0

The 121/4" Hot Rod Truss Rod...

By

Verified Buyer


is exactly what I needed to replace an over-long old-fashioned double action that had been retrofitted into a trainwreck of a D 12-20 (1968). The right length and adjustability to reinforce the (apparently slimmed down) neck!

5.0

Hot Rod Truss Rod

By

Verified Buyer


With only minor adjustments I was able to fit the Hot Rod truss rod into an acoustic 12 string guitar neck.

5.0

Excellent truss rod

By

Verified Buyer


I've been putting these in my necks for a number of years now and have had no problems at all. I guess the true test will come when one of my necks decides to start warping...

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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

11.5MB File

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