Korena
Product detailSKU #1313854598005

Graph TechPT-6642-00 Black TUSQ 6 String Nut

Graph Tech
Graph Tech PT-6642-00 Black TUSQ 6 String Nut
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Independent shopping perspective

The Korena take

A drop-in replacement nut for 6-string guitars with a 1.349" outer-string spacing. For players swapping out a worn or badly cut plastic nut.

Graph Tech PT-6642-00 Black TUSQ 6 String Nut product detail
Product studyGraph Tech PT-6642-00 Black TUSQ 6 String Nut
Graph Tech PT-6642-00 Black TUSQ 6 String Nut alternate view
Alternate view

Strong match

Who this is for

  • Replacing a cracked, worn, or poorly slotted factory nut
  • Guitars where strings bind and detune at the nut
  • Techs who want consistent, uniform nut material batch to batch

Consider the trade-offs

When to look elsewhere

  • Anyone unwilling to file slots or pay a tech to fit it
  • Guitars with a locking nut or zero fret
  • Necks whose nut slot doesn't match 1.656" x 0.236"

What matters in use

The specifications, translated

Catalog numbers tell only part of the story. These are the details most likely to change how this product feels, sounds, or fits into a setup.

Detail 01

1.349" E-to-E spacing

Distance between outer strings. Wider than your current nut and the low E hangs off the fretboard edge.

Detail 02

1.656" length

The nut blank must fit your neck's nut slot end to end. Longer blanks can be sanded down; short ones can't be fixed.

Detail 03

0.236" thickness

That's the 6mm slot width. If your slot is narrower the nut won't seat; wider and it'll need shimming.

Detail 04

0.302" height

Overall blank height. Slot depth is filed from here, so tall is safe and short means the action can't be lowered enough.

Detail 05

TUSQ material

Man-made and consistent throughout, unlike bone, which varies piece to piece. Slots file cleanly and don't develop soft spots.

Detail 06

Black finish

The color runs through the material, so filing slots won't expose a lighter core.

Final check

Know before you order

  1. 01Measure your existing nut's length, thickness, and height before ordering
  2. 02Slots come pre-cut but almost always need final depth filing per string gauge
  3. 03Removing the old nut can chip the fretboard or finish; score the joint first

Product questions

Before you decide

Straight answers to the questions shoppers most often ask about this product.

01Do I need to file the slots myself?

Usually yes. The slots are cut, but final depth depends on your string gauges and desired action. Filing too deep causes open-string buzz and can't be undone.

02Will this fit my Strat or Les Paul?

Only if the dimensions match. Measure your nut slot length, width, and the nut height first. Fender and Gibson nut slots differ in both length and radius.

03How is TUSQ different from bone?

TUSQ is a man-made material with uniform density, so every nut behaves the same. Bone varies piece to piece and can have soft spots that wear into a slot.

04Is it glued in?

A nut is held with a small drop of glue, not a full bond. It needs to come out again for future work, so use the minimum that keeps it seated.

Reference

Full specifications

The complete catalog record, organized around the decisions musicians make when comparing gear.

1 detailsBody & build
Color
Black
1 detailsSize & weight
Dimensions Lxwxh
1.656 inch x 0.236 inch x 0.302 inch
1 detailsOther
E to E
1.349 inch