Pre-slotted Bone Nut - Jazz Bass Neck W - 40 X 3.5 X 5.5 This wide Jazz Bass (J Bass) nut is precut and slotted to make your replacement faster and easier compared to having to spend the time shaping and cutting yourself plus give you all the great benefits of tone that a true bone nut offers. Instrument type designed to replace = Jazz Bass (wide) Nut Width = 1 9/16 in. (40mm) Thickness = 9/64 in. (3.5mm) Height at center = 7/32 in. (5.5mm)