Gauged Nut Slotting Files

  • 177 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!



0.013" width

Item # 0823
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0.016" width

Item # 0827
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0.020" width

Item # 0828
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0.024" width

Item # 0829
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0.028" width

Item # 0830
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0.032" width

Item # 0831
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0.035" width

Item # 0832
In stock, ready to ship!



0.042" width

Item # 0833
In stock, ready to ship!



0.046" width

Item # 5313
In stock, ready to ship!



0.050" width

Item # 0834
In stock, ready to ship!



0.056" width

Item # 0835
In stock, ready to ship!


Total: $0.00
Quantity: 20


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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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

  • Based on 177 Reviews
Displaying 3 of 18 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Write a review

Nut Slotting Files

By Joemac from Anola, MB, CA
(Customer's Reviews) Wednesday, December 11, 2013

This files are great for nuts, and for saddles like the ones on resonator biscuits. I'll certainly be ordering the rest of the set!

Joe MacLeod, Manitoba, CA


By Rex Hoopes from Boise Idaho
(Customer's Reviews) Thursday, December 05, 2013

These files produce good slots but the light gage one is very flimsy and came curved. I guess from the manufacture process. Working carefully with it produced my best string seat so far. After all what don't you have to be careful with while building guitars.

Top Notch

By ron ross from flowerdale australia
(Customer's Reviews) Wednesday, November 27, 2013

Very good and very careful, they cut quicker than you might think, so don't skip the measurements.

The right files for the job.

By Mack L. from California
(Customer's Reviews) Friday, November 15, 2013

There's nothing like using the perfect tool for the application. Time saver and perfect slots every time. Customers are amazed by how much better their guitars tuning stability and tone is after a nut replacement.

Great Set Of Files

By Reds from Louisa, Virginia
(Customer's Reviews) Thursday, November 14, 2013

Part of my work is, I purchase used lower price guitars that have good tone and I rework them for people wanting to learn to play. With most I have to lower the action so quality nut files are a must.
I had high expectations for all the tools that I ordered from Stewart-Macdonald and they were surpassed. The quality of each product and the service has won me over as a lifetime customer.

Glad i got em

By jered from munster, in
(Customer's Reviews) Sunday, October 06, 2013

After completing 2 nuts i was unhappy with i decided to suck it up and get some nut files (i got the .013, .024 and .036). WOW!!! i marked my string positions and within 5 mins was done (needed some fine tuning but very little). They may seem a bit pricy for a beginner/hobbiest, but are definitely worth the price if you plane on doing your own nut and saddle.

very good

By ph from Florida
(Customer's Reviews) Thursday, October 03, 2013

These files make life so much easier. You can actually get by with 3 of these if you pick the right ones. I've stacked the .010 & .013's with thicker ones to get a wider slot. You can also wobble them a little to pick up a few more .001ths. If you was working on all kinds of different guitars & strings, it would pay to get the whole set.

Quality files for the job.

By Commissioner from Norfolk, VA
(Customer's Reviews) Wednesday, September 11, 2013

I was impressed by the quality of these files. The string slots were precise. The files are super sharp and cut through bone with light pressure.

Slotting Files

By Donald from Pine Grove, CA 
(Customer's Reviews) Sunday, September 01, 2013

Nothing but perfection!

i'm nuts about your files...again!

By Campo Electric from Pollock, Louisiana
(Customer's Reviews) Friday, August 30, 2013

for a newbie, i thought i'd never actually have to order another set of nut files, but since the first ones from stew mac worked so well, i thought i'd go with them again....i didn't wear out the first ones, i lost them. only suggestion would be to have a hole in them in order to hang them on a nail or such. I haven't tried to drill them, but bet their a bugger. nice files.

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