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 10 of 10 1 2 3 4 5 6 7 8 9 10
Write a review
4.0

Convenient.

By
(Customer's Reviews)


I have built 8 electrics with these and I find them convenient to install since they use just a flat bottom channel.

I had one shear at the adjuster once, which made me livid, but I was able to save the neck and replace the truss rod without removing the fretboard. Always lubricate the threads and test it before installing. Proceed with caution while adjusting any truss rod.

On Fender style necks, with the adjuster oriented just under the fret board, the tightening/loosening direction is opposite to conventional so watch out for that!!

Finally, I'm glad there is now metric adjuster sizes!!

5.0

4mm Allen Nut Hot Rod

By
(Customer's Reviews)


It works realy well no rattle in the neck.Also theres no need for a large truss rod cover

1.0

HotRod installation for Fender headstock adjustment

By
(Customer's Reviews)


Just received the 4mm allen nut Hot Rod, and butchered a nice piece of wood trying to install it with adjustment at head stock end. CAN'T BE DONE ON A FENDER GUITAR but StewMac doesn't mention that anywhere. It can only be installed as a heel end adjuster) The 7/16 slot depth puts the adjuster too low into the head stock to allow access. If you want a heel end adjuster, buy the Fender style model, and don't mess around with an oddball 4mm adjustment.

5.0

4mm Allen Nut Hot Rod

By
(Customer's Reviews)


I love these hot rod truss rods. They are incredibly easy to install and use. The dual action has come in handy on a kit guitar I built. I use them on my electrics and acoustics.

5.0

Simply perfect

By
(Customer's Reviews)


Installs easily and precisely and the fact that works in both directions allows you to straighten the fretboard wile leveling the frets. Perfect

5.0

Great Product!

By
(Customer's Reviews)


I have always used these truss rods for my guitars. They work perfectly every time!

5.0

Great product

By
(Customer's Reviews)


I have purchased many of these truss rods and they work great. I use some woods harder then rock maple and have never had a problem with installation or use. Their service is top notch and I always get my order in two days. The trade secrets articles have given me the confidence and knowledge to do many guitar projects right the first time.

Displaying 10 of 10
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Shown on page 72 of our latest catalog.
  • Hot Rod® is a registered trademark of Stewart-MacDonald Manufacturing Company, Inc.