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Model 6520 The Un-Lock Nut - 6 String Slotted - Radius 16" - 406mm

Model 6520 The Un-Lock Nut - 6 String Slotted - Radius 16" - 406mm



Regular price $24.95 USD
Regular price Sale price $24.95 USD
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The 6520 is a great option to upgrade or replace the nut on your electric guitar equipped with the IBZ-style locking nut.

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” 0.609” 0.321” 1.433”
mm 42.82 15.47 8.15 36.4


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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 5.0 out of 5 stars
Based on 3 reviews
Total 5 star reviews: 3 Total 4 star reviews: 0 Total 3 star reviews: 0 Total 2 star reviews: 0 Total 1 star reviews: 0
100%would recommend this product
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3 reviews
  • TD
    Troy D.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    2 weeks ago
    fits Ibanez RG

    Fit my 90's RG . Had to sand the bottom a little bit but not much

  • CH
    Carl H.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    1 month ago

    I didn't have to sand or adjust anything after removing the existing locking nut and dropping this in. My Ibanez has a 17"radius Super Wizard neck and this is perfect.

  • DB Profile picture for Daniel B.
    Daniel B.
    Verified Buyer
    I recommend this product
    Rated 5 out of 5 stars
    2 months ago
    Best thing to ever happen to a locking nut!!

    I was having dead notes and fair at best tone with my Ibanez J custom. This nut not only got rid of the locking nut it gave me ultimate sustain, excellent tone and got rid of my dead notes on the fretboard. I am very pleased with this nut I would recommend this to everyone that uses Floyd Rose or locking nuts. What a game changer!! Thank you

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