Gauged Nut Slotting Files

  • 176 Reviews
  • Write a review

Our tempered edge-cut nut files produce round-bottom slots, to ensure that the strings seat properly in the nut without buzzing.

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0.010" width

Item # 0821
In stock, ready to ship!

$13.73

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0.013" width

Item # 0823
In stock, ready to ship!

$13.73

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0.016" width

Item # 0827
In stock, ready to ship!

$13.73

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0.020" width

Item # 0828
In stock, ready to ship!

$13.73

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0.024" width

Item # 0829
In stock, ready to ship!

$13.73

+

0.028" width

Item # 0830
In stock, ready to ship!

$13.73

+

0.032" width

Item # 0831
In stock, ready to ship!

$13.73

+

0.035" width

Item # 0832
In stock, ready to ship!

$13.73

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0.042" width

Item # 0833
In stock, ready to ship!

$13.73

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0.046" width

Item # 5313
In stock, ready to ship!

$13.73

+

0.050" width

Item # 0834
In stock, ready to ship!

$13.73

+

0.056" width

Item # 0835
In stock, ready to ship!

$13.73

+
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Total: $0.00
Quantity: 20

Video

Gauged Nut Slotting Files

It just makes sense to cut the string slots to match the string gauges! With this set of gauged files, your work is fast and accurate too.


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Details

Our tempered edge-cut nut files produce round-bottom slots, to ensure that the strings seat properly in the nut without buzzing.

Each chrome-alloy steel file has twin 4" cutting edges. Among our most popular tools, these professional files help you get the job done quickly and correctly.

What files do I need?
Choose nut slotting files that are the same size or no more that a few thousands larger than your individual string gauges. A smaller file can also be rocked side-to-side to widen a slot to the desired size. For example, you can cut a .043" slot with a .042" file by moving it around a bit.

Tip: Slotting Tune-o-matic style saddles
Nut slotting files work great for metal saddles. Choose your file size as you would when slotting a nut: use the same gauge as the string, or a few thousandths larger. After filing to the desired depth, we suggest polishing the slot with Mitchell's Abrasive Cord to remove file marks and burrs.


Trade Secrets! Newsletter

Are you supposed to slot Tune-o-matic bridge saddles?

Customers often ask how and why they should put slots in the saddles of their new Tune-o-matic bridge. Erick Coleman provides the answers in this issue of Trade Secrets.

Product Instructions

Making a Nut, Step-by-Step

Dan Erlewine, of Stewart-MacDonald's R&D Team, walks you through making and installing a new nut.

Ratings & Reviews

Gauged Nut Slotting Files

  • EXCELLENT PRODUCT
  • GOOD PRODUCT
  • AVERAGE PRODUCT
  • FAIR PRODUCT
  • POOR PRODUCT
  • Based on 176 Reviews
Displaying 6 of 18 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Write a review

Simple is good.

By Martin Brunkalla, Luthier from Marengo, IL
(Customer's Reviews) Thursday, February 21, 2013


I've tried many different tools and methods for nut slotting over the last thirteen years and have yet to find a more practical and effective means of getting the job done. I have yet to wear one out, even with a few MOP nuts in the mix. You might want to add a "backbone" to the .010" file however. I cut a couple strips of Ipe wood (very stiff) 1/16" X 3/16" X 5-7/8" and ca glued them down the center of each side of the file while holding everything perfectly flat. The wood gives it a nice grip while keeping it straight and rigid. A little bevel on the business end and it still slips into the protective sleeve it came in. I use a little white paraffin to lube the files when they get "bindy" in bone or MOP. Great little (simple) tools.

Tools that perform better than expected.

By Bagotti from Arkansas City, Ks
(Customer's Reviews) Thursday, February 14, 2013


I recently purchased these nut slotting files and found them to be the perfect solution to a deceptively simple task. Especially for the larger A and E strings

Cuts SLOW!

By Dude Guyman from Twin Lake, MI.
(Customer's Reviews) Thursday, January 10, 2013


I've only used them on a pre-slotted, plastic nut so far, and it took forever just to deepen the existing cuts a little bit. Like sawing tree branches with a butter knife.

great tool

By Gunner3160 from Ogden UT
(Customer's Reviews) Wednesday, January 02, 2013


works exactly as advertised. Watch out - it's easy to cut too much! The narrower they are, the faster they cut.

Excellent files

By RIX from Sacramento, CA
(Customer's Reviews) Friday, December 21, 2012


Excellent file for making exact sized slots in nuts.

Working perfectly, should be better protected

By Eros Nicolau from Bucharest, Romania
(Customer's Reviews) Saturday, December 08, 2012


For the job, these files work perfectly. The only drawback is that the paint on the handle end gets smudged in minutes of use, so in order not to lose the gauge markings I had to wrap all my files' ends in clear scotch tape for protection. An extra coat of clear lacquer on the handles would be welcome.

Nut Files

By MarkD from Illinois
(Customer's Reviews) Wednesday, December 05, 2012


Very easy to use and saved me a ton of time. Last nut I cut with swiss files. Turned out good, but since I intend to build several more instruments, seemed like an easy purchase to justify. So much easier to fine tune the depths.

Nut Files

By DomenicD from West Chester PA USA
(Customer's Reviews) Sunday, November 25, 2012


There is no substitute for having a quality tool to work with. Having tried using a cheap gas torch tip cleaner on previous projects, the StewMac Nut files are the only way to go. The control, ease and speed of task time is appreciated.

Fast Job

By omarintintin from Mexico City
(Customer's Reviews) Friday, November 23, 2012


This tools definitely allows you to make the job in minutes and whit great results

Gauged Nut File- Improvement

By steveburchguitar from Melbourne Australia
(Customer's Reviews) Friday, November 23, 2012


I just received these Nut Files and I am sure they will do a great job, but I feel the thinner ones .010" to .20" need to have a stiffener added on either the sides or top to keep the file straight. The .010" is particularly 'bendy'.

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