43 mm Unslotted Bone Guitar Nut

The 43 mm bone guitar nut is an uncut blank intended for custom shaping and fitting. It is supplied in a standard-size format suitable as a starting point for many guitar necks and for lutherie projects requiring precise individual adjustment.

Made from natural bone, this nut blank measures 43 mm wide and 9 mm deep. The 43 mm width is common on many guitar necks, although the actual fit must always be checked against the instrument.

This is an unslotted guitar nut blank: it is delivered without string slots. The height must be adjusted and the slots cut to suit the guitar. This fitting work is essential for comfortable action and correct intonation; the blank is not ready for direct installation.

Several variants are available. Choose a 3 mm or 5 mm thickness. Versions with a 9.5-inch or 12-inch radius are offered, along with an un-radiused blank for complete custom shaping.

Bone is a traditional material in guitar making. It offers a useful balance of hardness and workability, allowing clean, durable string slots when properly shaped. Because it is a natural material, slight variations in appearance may occur without affecting its function.

In tonal terms, bone is often considered a reference nut material. It can provide a clear attack and efficient transmission of string vibration on open strings. As with any nut, its influence is much less significant when a note is fretted. Its value lies in both performance and traditional construction.

This unslotted bone nut blank provides a dependable basis for a custom fit. It is intended for luthiers, DIY builders and guitar owners prepared to shape and slot the nut accurately. For other guitar maintenance work, discover our fret reshaping file.

For technical information on the role of a Fender-style nut, see our article on guitar nuts. You can also consult this additional reference article.

In summary, this 43 × 9 mm natural bone nut blank is a durable, practical component for guitar building and repair, provided it is carefully adjusted to the individual instrument.