ZB-4 Unslotted Replacement Nut for Guitars

$39.99

Material

Slots

The Zero Glide Replacement Nut System borrows the "zero fret" concept to reduce string contact in the nut by up to 93%, increasing tuning stability, playability, and open string tone. It only takes a few minutes to install with absolutely no permanent alteration to your instrument. For Martin & Taylor Style Guitar (Blank).

Also available in Black Delrin.

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See sizing guide for correct fit.
  • Length: 48.0mm (1-57/64")
  • Radius: 16"
  • Production Height: 9.5mm (3/8")
  • End Height: 8.79mm (11/32")
  • Fingerboard: 7.3mm (9/32")
  • Thickness: 5.9mm (15/64")
  • Fret Sizes: L, M, H, J (.035", .039", .043", .051")
  • Special Notes: Unslotted Version of ZS-3, ZS-5, ZS-14, ZS-15
ZB-4 Unslotted Replacement Nut for Guitars
*Measurements in mm
Convert to inches

Reviews

Worth The Effort

May 15, 2016

An inexperienced guitar tech worked on the nut of my Guild M75 Aristocrat electric and I ended up with a "sitar" sound on my high E string and a dead G string and bad intonation. A friend recommended Zero Glide and that company recommended this particular nut.

Installation was not particularly difficult for a handy guy, but took two hours and involved sanding nearly 1/8 inch off the bottom of the new nut and 1/16th plus off each side while being careful to keep it even. The video on the company website helps. Once fitted correctly you decide how big of a 'zero fret' you want. There are four of different sizes in the package. I tried them all and found that the smaller ones provide very low action at the nut (which is nice), but require a higher action up the neck to clear the first fret where the strings can rattle. I ended up using the largest fret provided as it allowed me low action where I need it. Once you have it figured out you trim the zero fret to length and glue it

WAL from Review pulled from Amazons Zero Glide Product Page
Zero Glide Query

Jun 23, 2025
I have a BC-350 banjo with the zero glide nut. It has been problem-free but I'm curious how this is an improvement over the zero nut found on budget European guitars since practically the beginning of time. I repaired instruments for decades and always regarded the zero fret as a marker of an inferior mass-produced instrument. No criticism of the Gold Tone zero glide is in any way implied here but I am confused.
CHRIS Battis Review pulled from Amazons Zero Glide Product Page
This Fixed It

Nov 3, 2023
The G string on my Epiphone Dot was bound up in the nut and always pinging loose when trying to tune it. It would suddenly be sharp then suddenly flat etc. I installed a Zero Glide on her her and problem solved. Not only that but it has also improved tone. Honestly I was just trying to do a quick fix in order to sell her but the new life in her changed my mind.
Gene Molloy Review pulled from Amazons Zero Glide Product Page
Acoustic Glide Nut

Oct 7, 2016

I installed this on an old Alvarez acoustic that used to belong to my Dad. The strings had started to buzz badly and the bridge height was maxed out so I knew it must be the nut. Took about an hour to cut down the new nut and shape with the Drexel tool; sided/polished the frets and installed glide nut with the tallest feet wire. Worked like a charm and no more buzzing. Even lowed the bridge down to a reasonable height as well. Great product and easy to install.

Jan Scallan from Review pulled from Stew Macs Zero Glide Product Page
The Offset Tang On The Fret Is The Key

Oct 15, 2016

I bought the mandolin version and fitted it to my Gibson. There's a lot of extra material to remove, but the result was great. Easier tuning (the old nut had tight slots for the A strings), better intonation. Later I used one of the extra frets in the package to fix a tenor guitar. For that, I simply filed the necessary ledges in the existing nut and widened the string slots. It would be nice if Stew-Mac would also sell the offset tang frets separately, for retrofitting to an existing nut.

Ross from Review pulled from Stew Macs Zero Glide Product Page

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