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4mm Allen Nut Hot Rod Truss Rod

4.5
  • 132 Reviews
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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
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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
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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)

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4.5
  • 4.48 average rating from 132 reviews
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5.0

Hot Rod Truss Rods

By

Verified Buyer


I use these in every guitar I build and wouldn't go back to single rods at all. For me they are easy to install and work great. Thanks StewMac. Tom at AZGuitars.

5.0

2 way truss rod

By

Verified Buyer


I used them once, and I`m never going to use anything else. They are effortless too, and provide tremendous control over the neck. By using two carbon fiber reinforcements on either side of the truss rod, it is possible to make a very thin but very strong/stiff neck.

5.0

Hot Rod Bass Truss Rod

By

Verified Buyer


This was my first time replacing a Truss Rod on any instrument, but the instructions were detailed, and the product performed flawlessly!! Really great Truss Rod! I did research the fretboard removal using a clothes iron and wet cotton sock, worked very well. Thanks Stewart- MacDonald!!!

5.0

Dual Action Truss Rod

By

Verified Buyer


I love these rods. They go in all my builds these days, along with a pair of carbon fiber reinforcement strips. My necks are absolutely rock solid and stable, yet still still have just enough give in them to perform neck bends when desired. That can be a tough balancing act for any luthier to achieve, but these rods make it easy.

Also, the perfectly sized router bit that Stew Mac sells for both the rods and the carbon fiber strips makes installation a breeze.

5.0

Dual action truss rod

By

Verified Buyer


These are a great item. I have only used these truss rods in my builds, and they perform flawlessly. Easy to install, and adjust; they simply just work!

5.0

Dual Action- Gotta love it

By

Verified Buyer


Easy to install and peace of mind

4.0

Very nice truss rod

By

Verified Buyer


Double action rods was always my favorite. My suggestion is that the brass collars should be replaced with a stronger material. Time will show it's strength.

5.0

Powerful rod

By

Verified Buyer


I have found if I bed both brass ends with epoxy, the rods work/sound better.

4.0

Total adjustability

By

Verified Buyer


I've been using this rod in all my guitars and they've worked great. I even was able to pull a neck back into position that had spent days floating around in it's case two years ago in the flood that hit the Nashville lockup where lots of touring musicians stored their instruments. I do think owners need to be advised not to try and straighten a neck just by turning the nut. Clamps are your best bet and just use the neck rod to hold things in position once you've got things where you want them. I'm afraid an uninformed owner might strip threads otherwise.

5.0

Great choice

By

Verified Buyer


i am working to build a 7 strings LesPaul shaped guitar,For the Truss rod,I stopped my choice on 4mm which corresponded to my expectations, the build quality is excellent and the rod is adjusted to perfection, thanks StewMac.Mark Davis

Displaying 7 of 14
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StewMac PDF Catalog, page 76 See 4mm Allen Nut Hot Rod Truss Rod
on page 76 of our StewMac Digital Catalog



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