The truss rod adjustment on a gibson les paul is done using its brass nut at the headstock end of the neck located under the truss rod cover funnily enough.
Gibson truss rod nut.
16 futheda guitar truss rod wrench luthier screwdriver for taylor guitars silver 4 3 out of 5 stars 42.
If you loosen the truss rod too much releasing it from the captive nut close to fret 20 the whole rod can come all the way out.
It has thin walls that make it easy to get in the truss rod cutout of the peghead.
The short taper leaves more metal for the hex sides which gives wrenches a good grip.
Sometimes the truss rod can be really stuck requiring you to use a small adjustable wrench to turn the hex wrench.
Gibson used short taper truss rod nuts from the late teens into the early 1950s.
They should have them wherever they sell gibson or aftermarket guitar parts.
Your guitar must be tuned to pitch using your preferred gauge of strings when you do this and under tension or it simply won t be correct.
Guitar truss rod wrench luthier tool for 8mm 5 16 gibson nut brand new 3 9 out of 5 stars 3 9 16 9.
Interestingly these nuts sit lower than the headstock facing so it looks like the damage occurred as the face of the headstock was being prepped to receive the overlaid facing.
Edited september 11 2019 by mihcmac.
5 16 hex brass 5 16 length 10 32 thread.
Gibson started using the long taper nuts in the 1950s and continues to use them today.
Truss rods and truss rod nuts allparts uk.