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Black TUSQ XL Slotted 1 3/4" Angled Bottom (PT-M644-00)

Black TUSQ XL Slotted 1 3/4" Angled Bottom (PT-M644-00)



Regular price $15.02 USD
Regular price Sale price $15.02 USD
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The PT-M644-00 is a great option to replace or upgrade the nut on your six-string acoustic or electric guitar. Developed for Martin-style guitars and can be used with other guitars that require similar nuts.

It has an angled bottom and is pre-slotted for a quick and simple installation.


Black TUSQ XL is designed to boost guitar tone and performance. This precision-engineered nut is made with a specially formulated material that couples the strings' vibrations to the neck and brings out the hidden harmonics and richness in every note. It is based on the highly resonant TUSQ man-made ivory but is impregnated with PTFE to improve the tuning performance of the guitar.



To be updated.


Measure Length Width Height E to E
inches 1.745" 0.224" 0.361" 1.418"
mm 44.32 5.69 9.17 36.02


To be updated.

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Rated 4.5 stars
Based on 2 reviews
Total 5 star reviews: 1 Total 4 star reviews: 1 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
100%would recommend this product
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2 reviews
  • TG
    Tristan G.
    Verified Buyer
    I recommend this product
    Rated 5 stars
    1 week ago

    New nut and saddle + some folk nylon strings brought some new life to a beat up ~70 year old Wards (Harmony) parlour guitar with terrible action and wouldn’t stay in tune more than one song . Now it’s one of my favourites to just grab and play effortlessly!

  • EJ
    Erik J. T.
    Verified Buyer
    I recommend this product
    Rated 4 stars
    3 weeks ago
    Not a great fit for Martin dreadnaught guitars

    The radius of the precut slots are not a match for my Martin D-18. When sizing the nut, when I got the clearance perfect on low and high E strings above the first fret, the rest of the strings are too high, especially D and G strings. I can't go any lower on the nut without getting buzz on the E strings so I will need to buy tools to cut down the grooves so the radius of the precut slots in the nut matches the radius of the guitar neck. Perhaps most modern acoustic guitars have more curvature on the fretboard.

    Also, the slots are just slightly too close together--I carefully measured and looked for a nut on your site that was closer to what I had before, but could not find a closer match. This one is close, but compared to my other Martin D-18, the playability, especially in first position is just not as good. Guess I need to learn to cut my own nut from a blank next time. There isn't a luthier anywhere within hours of me that I trust to create the nut and set up this guitar, and I'm quite picky about playability as a pro and was so hopeful graphtech would have what I needed but I guess most Martin acoustic players don't buy graphtech nuts.

    However, when I bend strings, they do return to proper tuning better than with my old bone nut, so the XL self lubricating feature works as advertised.

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