--- product_id: 742750517 title: "Graph Tech PT-6643-00 GRAPH TECHIbanez/PRS BLACK TUSQ XL Nut" brand: "グラフテック(graph tech)" price: "3016 kr" currency: ISK in_stock: false reviews_count: 11 category: "グラフテック(Graph Tech)" url: https://www.desertcart.is/products/742750517-graph-tech-pt-6643-00-graph-techibanez-prs-black-tusq store_origin: IS region: Iceland --- # Boosts sustain & sound clarity Perfect fit for Ibanez/PRS guitars Pre-slotted for easy installation Graph Tech PT-6643-00 GRAPH TECHIbanez/PRS BLACK TUSQ XL Nut **Brand:** グラフテック(graph tech) **Price:** 3016 kr **Availability:** ❌ Out of Stock ## Summary > 🎸 Elevate Your Tone, Sustain Your Edge! ## Quick Answers - **What is this?** Graph Tech PT-6643-00 GRAPH TECHIbanez/PRS BLACK TUSQ XL Nut by グラフテック(graph tech) - **How much does it cost?** 3016 kr with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/742750517-graph-tech-pt-6643-00-graph-techibanez-prs-black-tusq) ## Best For - グラフテック(graph tech) enthusiasts ## Why This Product - Trusted グラフテック(graph tech) brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Effortless Installation:** Pre-slotted design means minimal setup—get back to playing faster with professional-grade ease. - • **Enhanced Sustain & Tone:** Dramatically increases string resistance and sustain, unlocking richer bass and sparkling trebles. - • **Tuning Stability You Can Trust:** Innovative TUSQ material reduces string stress and friction, keeping your guitar perfectly in tune. - • **Precision Fit for Iconic Guitars:** Tailored for Ibanez and PRS models, ensuring seamless compatibility and performance. - • **Revive Your Guitar’s True Voice:** Transmits string vibrations efficiently to restore the authentic, vibrant sound your instrument deserves. ## Overview The Graph Tech BLACK TUSQ XL Nut (PT-6643-00) is a premium replacement nut designed for Ibanez and PRS guitars. Crafted from advanced TUSQ material, it enhances string sustain, tuning stability, and overall sound quality. Pre-slotted for easy installation, this black nut optimizes vibration transfer to deliver richer, more dynamic tones, making it a must-have upgrade for serious guitarists seeking professional sound and reliability. ## Description The PT-6643-00 is a great replacement for the BLACK TUSQ XL Nut for many Ivanies or PRS electric guitars. The bottom (adhesive side) does not angle to the fingerboard surface. Pre-slotted for minimal processing and ready to use. The BLACK TUSQ XL series moves and vibrates with the strings to create a thin Teflon membrane on the contact surface by friction. It works as a lubricant to prevent strings from being held more than needed, reducing the stress that tends to focus on one point. This makes the string less likely to cut and makes tuning more stable. The most efficient transmission of string vibrations to the body and brings out the original sound of your instrument from bouncy treble to rich bass. It has more mulsonic content than conventional ones and restores the wonderful sound that has been lost. [Note] For some products, the model number has been changed from -00 to -C0. Although the model number is mixed with the product, the part itself is not altered, it is the same product. Installation may require modification to fit individual instruments. The right skill and knowledge are required to handle it. We recommend that you have a professional professional or instrument store. We do not accept any warranty regarding damage or damage caused during installation. Review: ヘッドレスギターで3フレットあたりでチョーキングする際ゼロフレット部がズレたりするため本製品を付けてみました。弦の溝が切ってあるため初心者でも取り付けが簡単に出来ます。音も伸び、音質も良くなりました。 Review: 使えました。 ## Features - BLACK TUSQ XL Nut perfect for many ivanies or PRS guitars - Dramatically Increases Strings Resistance and Sustain - Improved sound quality / Tuning stability - Dimensions: 5.98mm W x 42.95mm L x 7.95mm H - Specifications: Slotted (string): 1.4 inches (35.22 mm) / Color: Black ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B0037NVSYY | | Amazon Bestseller | #12,999 in Musical Instruments ( See Top 100 in Musical Instruments ) #500 in Guitar Cleaning & Care Products | | Back Meterial | Maple Wood | | Body Material | Spruce | | Color Name | black | | Customer Reviews | 4.7 4.7 out of 5 stars (852) | | Date First Available | August 13, 2012 | | Fretboard Material | Rosewood | | Guitar Bridge System | Fixed | | Guitar Pickup Configuration | S-S-S | | Is Discontinued By Manufacturer | No | | Item model number | PT-6643-00 | | Number of Strings | 6 | | String Material | TUSQ | | Top Material | Spruce Wood | ## Product Details - **Back Material Type:** Maple Wood - **Body Material:** Spruce - **Brand:** グラフテック(Graph Tech) - **Color:** black - **Top Material Type:** Spruce Wood ## Images ![Graph Tech PT-6643-00 GRAPH TECHIbanez/PRS BLACK TUSQ XL Nut - Image 1](https://m.media-amazon.com/images/I/41xGHt5vvaL.jpg) ## Questions & Answers **Q: which nut do i need to replace the black one on my epiphone less paul ?** A: You need to pay very close attention to the string spacing on your guitar. This nut is for a string spacing of 1-3/8". Epiphone Les pauls have a string spacing at the nut of 1 3/8". USA Gibson Les Pauls have a string spacing of 1-7/16". That 1/16" makes a difference. You make sure you get the right one. The string spacing on this particular nut is 1-3/8" which will also fit an ESP LTD EC series guitar. Graph Tech does make an exact fit for a 1-7/16" Les Paul nut. These are good quality. **Q: Will this fit Ibanez Gio guitar? If not can a nut be recommended?** A: It needs to match the neck radius and the string width. Measure those two things and if it matches this nut then it should fit. To measure the radius I just made a template from cardboard. Height wise this nut has plenty of stock to be fit to any neck. I think I ended up sanding about 1/8" off the bottom to fit it to my Yamaha se350 (strat style guitar). **Q: Will this fit a Jackson js22 dinky ?** A: Whatever nut you decide on, some adjustment will be needed. If you don’t have the tools to do it, bring to a luthier. If you do decide to do it, you will need a caliper and some files. Good luck. **Q: Is this for a right-handed guitar?** A: Yes ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by 抜***忍 on May 28, 2025* ヘッドレスギターで3フレットあたりでチョーキングする際ゼロフレット部がズレたりするため本製品を付けてみました。弦の溝が切ってあるため初心者でも取り付けが簡単に出来ます。音も伸び、音質も良くなりました。 ### ⭐⭐⭐⭐⭐ Review *by A***ー on May 6, 2025* 使えました。 ### ⭐⭐⭐⭐⭐ Review *by 天***狗 on August 26, 2021* ヤマハのレブスター(RS420)のオリジナルナットの溝切りが甘かったのでこちらに交換しました。 幅、高さはほぼそのまま。厚みだけサンドペーパーで削って取り付けました。数ミリ削らなくてはなりませんが、ギターの取り付け溝に当てがいながらサイズを確認しつつじっくり作業すれば失敗は無いと思います。 ナットに元々切ってあるスリットの角度がぴったりで、こちらの方が純正に見えるくらいです。 チャリン!とした硬質な出音となりました。 ## Frequently Bought Together - GRAPH TECH GUITAR LABS Guitar Top Nut (PT-6643-00) - PRS Guitars SE Locking Tuners Set of 6, Chrome (106297::C:003) - Graphtech Stringsaver Saddle Prs -6pcs --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.is/products/742750517-graph-tech-pt-6643-00-graph-techibanez-prs-black-tusq](https://www.desertcart.is/products/742750517-graph-tech-pt-6643-00-graph-techibanez-prs-black-tusq) --- *Product available on Desertcart Iceland* *Store origin: IS* *Last updated: 2026-05-30*