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
In stock, ready to ship!



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

Great files

By ChrisG from Winnipeg, MB Canada
(Customer's Reviews) Thursday, February 16, 2012

I bought 4 of these for Ukes - 028, 032, 035 and 042. Just file away until the file touches a 050 feeler guage placed on the fingerboard - perfect!

well worth the money

By danor1023 from oregon
(Customer's Reviews) Wednesday, February 08, 2012

If you can afford these files buy them.They make your work so much faster and easier.Tip cleaners and feeler gauges for files are not accurate.These files will last forever if taken care of.

I agree with everyone else.

By Canada Guy from Church Point, Nova Scotia
(Customer's Reviews) Friday, February 03, 2012

I got a set of these as a Christmas gift, from my luthier brother-in-law. As I play with dainty strings (mostly nines), I added the .010 file to the collection.

They work.

Are there better ones? Maybe...but I won't be looking for them.

They work. That's good enough for me.


By Moriarty Guitars from Dublin Ireland
(Customer's Reviews) Tuesday, January 31, 2012

I've made countless nuts with these files. Their flat sides can be useful if using spacers to determine your slot positions. For example, I have found it useful to slot a small nut-sized piece of wood and get the spacing perfect. Then clamp this piece with your bone blank in the vise. The wooden piece acts as a template for transferring the slot positions - similar to using an old nut, but more accurate! These files are perfect for this method.

beats a pocket knife

By frailingbanjo from moorhead, mn
(Customer's Reviews) Friday, January 27, 2012

I have two sets (one for steel strings, one for nylon strings). Use to use a gent saw and a pocket knife to make slots. These files do a wonderful job. Well worth the money.

a MUST have for alternate tunings

By Jeremy Jo from Mississauga, ON, Canada
(Customer's Reviews) Wednesday, January 11, 2012

I set up my guitars with many different tunings with different string gauges.
These do a wonderful job of help me set up each of my guitars for the specific gauge set!

Great & Excellent!!!!

By Kelvin Tay from Singapore
(Customer's Reviews) Friday, January 06, 2012

Nothing to say... simply wonderful and a must have tool for nut filing!!!

Does the job.

By George Casiano from Corona, CA
(Customer's Reviews) Thursday, January 05, 2012

Only complaint is I wish the .010 and .013 didn't wear out so fast but I guess that's to be expected since they are thin and I used them a fair amount. Works great!

Exactly what you need!

By Wv Bluesman from Suwanee, Ga
(Customer's Reviews) Sunday, December 25, 2011

These made achieving proper string height and slot width on the nut a breeze.

Nut Slotting Files

By Pat Green from UK
(Customer's Reviews) Friday, December 23, 2011

These produce a very nice rounded shape for the nut slot with parallel vertical sides. I found matching the file gauge with the string gauge made the strings a pretty tight fit so I rock the file from side to side slightly to open the slot out a bit.The parallel sides of the file mean that if you haven't cut the nut top pretty close to the final profile the file snags a bit.

Overall I prefer the shape of the slot produced with this file than the double sided version which I also use (but doesn't snag)which produces a V shaped slot.

Displaying 11 of 18
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Shown on page 4 of our latest catalog.