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!



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
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0.046" width

Item # 5313
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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 176 Reviews
Displaying 8 of 18 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
Write a review

Nut Files

By ROCKGODMUSIC from United Kingdom
(Customer's Reviews) Wednesday, August 29, 2012

Good quality files that I find essential to do a good job. Customers happy then I'm happy !

These are essential!

By Jay Scott from West Chester, PA
(Customer's Reviews) Friday, August 17, 2012

They are expensive, but worth it! Work great and last forever. I used these most recently for my Tele-assembly project. Can't do this stuff without my Stew-Mac tools and parts.

Worth the Money

By abilbay from Ft Worth, TX
(Customer's Reviews) Tuesday, August 14, 2012

Have used them to make 3 nuts. They are high priced, but are worth the extra $. One word of advice; GO SLOW and check depth OFTEN, they cut so fast.


By Mathieu from Canada
(Customer's Reviews) Thursday, August 09, 2012

Those work like a charm. The only reason I gave them 4 star is because I use the XL nickel regular-light strings, which is pretty much a standard, and the size of some files is 0.001" smaller than some of the strings. It's no big deal but it would've been nice to get a perfect fit.

Basic tool

By Patrick Patten, Patten Guitars from Fredericton, NB Canada
(Customer's Reviews) Wednesday, August 08, 2012

I use these files every day and they do the job they are meant to do. Not fancy but they work fine.

Go nutty

By Dingobass from Perth, Australia
(Customer's Reviews) Friday, July 20, 2012

Great tools, I use them all the time and get great results.

Great Saw!!

By Pestvic from Sparks NV
(Customer's Reviews) Wednesday, July 18, 2012

Cuts at the perfect speed so you dont cut to much. I ordered the lowest gauge as a start for my slots. This one was a little too thin for me but would work perfect for a 10 gauge string. All in all they do what they say :)

Right tool for the job!

By Colt W. Knight from South Charleston, WV 25309
(Customer's Reviews) Tuesday, July 17, 2012

I have a full compliment of stew mac nut files. Both these style and the double sided files. I really like the handle on the double sided file. Makes things easier. However, these work just fine. I cringe whenever I see people trying filed feeler gauges and torchtip cleaners instead of real nut files.

Gauged Nut Slotting Files

By Gusty from Ro
(Customer's Reviews) Tuesday, July 10, 2012

Quality tool.

Best tool for the job

By Tewiq from Canada
(Customer's Reviews) Sunday, July 08, 2012

If your looking for a quality tool that will do the job , look no further this is it. Nothing else that I've tried works as well as these files. Ruff in the slot with a saw and then finish with the files. They are the best.

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