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Model 6519 The Un-Lock Nut - 6 String Slotted - Radius 12" - 305mm

Model 6519 The Un-Lock Nut - 6 String Slotted - Radius 12" - 305mm



Regular price $24.95 USD
Regular price Sale price $24.95 USD
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The 6519 is a great option to upgrade or replace the nut on your electric guitar equipped with the Floyd Rose locking nut.

It serves to replace FR Special-style locking nuts.

Click to find the other options for un-lock nuts.


It is pre-slotted so it will make for an easy install.

Check the Un-Lock Nut Installation Instructions (opens in the new tab).


Advanced Slot Design: Our reimagined slots perfectly accommodate the unique string behavior on Floyd Rose-style guitars, ensuring precision and stability.

Precise Radius Matching: Lock nuts from various manufacturers often miss the mark on radius accuracy. With the Un-Lock Nut, select the perfect radius for your guitar. Crafted from Black TUSQ XL, it allows for individual string height adjustment, ensuring unmatched precision.

Customizable String Heights: The Un-Lock Nut stands out with its ability to be customized for each string's height, offering the adaptability of a standard TUSQ XL nut.

Optimized for Floyd Rose: Designed for Floyd Rose-style bridges and locking nuts, the Un-Lock Nut integrates seamlessly, requiring no guitar modifications.

Enhanced String Stress Distribution: Its extended ramps distribute string stress more evenly, infused with triple the self-lubrication for a friction-free glide, without affecting the nut slot integrity.

Cost-Effective for Manufacturers: The Un-Lock Nut isn't just a player's dream; it's a boom for manufacturers. Its design simplifies installation, increases accuracy in string radii, and boosts customer satisfaction.

Effortless Installation: Installing the Un-Lock Nut is straightforward. Just sand the ends for a flush fit and use a bit of white wood glue. No guitar modifications are needed.

Available Sizes: offered with a 10" radius in FR Original #2 and FR Original #3/#4 sizes, with 12” in FR Special, and with 16” in IBZ options.

Measure Length Thickness Height Str.Sp
inches 1.686” 0.607” 0.362” 1.411”
mm 42.82 15.42 9.2 35.85


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What is the Difference in TUSQ Materials?


TUSQ nuts have a rich tone without the inconsistency found in ivory, bone, and other natural materials. Bone and ivory have hard and soft spots (grain) throughout each piece, hampering the consistent transfer of vibrations to the guitar top. TUSQ nuts are designed to transfer the right frequencies more efficiently from the string to the guitar body.

Best for Acoustic Guitars.


TUSQ XL and Black TUSQ XL nuts are designed to boost guitar tone and performance. These precision-engineered nuts are 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 permanently lubricated to improve the tuning performance of the guitar.

Best for Electric Guitars and BASS.

Rated 4.8 out of 5 stars
Based on 6 reviews
Total 5 star reviews: 5 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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6 reviews
  • CC
    Carson C.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    2 weeks ago
    Unlock Nut

    Fits perfectly! Love this product, great upgrade for my Jackson Warrior

  • C
    I recommend this product
    Rated 5 out of 5 stars
    3 weeks ago
    5 Stars

    Great product for anyone using a floyd rose but hates using a locking nut. Just ad this with locking tuners and you're all set

  • AE
    Arlen E.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    2 months ago
    These are fantastic

    I haved used these on 3 guitars now. I have been using them on builds with necks I that have a floyd shelf but on a non-locking trem guitar. Super easy install, had to sand a couple a little narrower and one a little off the back to get the action lower, but that is it. Great tuning stability. I am unaware of any other such solution curretly available. Thank you for making these.

  • EH
    eric h.
    Verified Buyer
    I recommend this product
    Rated 4 out of 5 stars
    3 months ago
    Incredible Nut for Floyd users

    I was skeptical at first due to the neck shape of my Jackson Kelly Jeff Loomis. With some small dabs of CA glue the nut stayed on with a shim under it with 0 issues moving. I bought some new Graph tech locking tuners to replace the stock ones. The tuners are so good!!! The trem is blocked so it will only dive bomb. Overall the stability is incredible with bending strings and playing for long periods of time. I gave this 4 stars due to the 6 and 4th strings binding when dive bombing. Overall I think this is an incredible nut and will work perfect for headstocks with a straight pull or head stocks with less angle compared to the Jacksons. I plan on using this nut for my non-jackson guitars.

  • DR
    David R.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    3 months ago
    a perfect product!

    I had a Floyd Rose locking nut and a Kahler on a Les Paul, and reverted to Tune-o-matic and a Model 6519 un-lock nut. Installation was easy, as everything fit PERFECTLY! I swapped parts, include the old shims, and the action is exactly the same, and it works flawlessly. The main benefit is than I don't have metallic plinky noises from strings hitting the sides of the unlocked Floyd nut now, and I can revert to locking nut and Kahler any time, so zero downside. I can't recommend this strongly enough! Make sure you get the right size!!

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