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.
Gibson truss rod nut.
Truss rods and truss rod nuts allparts uk.
Edited september 11 2019 by mihcmac.
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 started using the long taper nuts in the 1950s and continues to use them today.
It has thin walls that make it easy to get in the truss rod cutout of the peghead.
16 futheda guitar truss rod wrench luthier screwdriver for taylor guitars silver 4 3 out of 5 stars 42.
You can use a 5 16 socket but i would recommend one of those gibson truss rod wrenches that looks like a little corn cob pipe but is usually black in color sometimes chrome.
It is usually not too hard to thread it back in.
Guitar truss rod wrench luthier tool for 8mm 5 16 gibson nut brand new 3 9 out of 5 stars 3 9 16 9.
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.
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.
The short taper leaves more metal for the hex sides which gives wrenches a good grip.