What size is the truss-rod socket?

[advennt]

Hey guys,

I'm experiencing fret buzz on most of the strings in the lower frets (1-4).

I opened up the truss-rod cover when I did a fresh set-up for my guitar today, but none of my Allen wrenches seem to fit - the 4mm is too small, but the 5mm is too large.

What am I missing out here?

b.t.w I have a DK2.

[levantin]

Try the 4 again

[84sups]

Are you sire it's a allen key? Every Jackson I've owned just had a standard old nut on the end of the trussrod but I never had to set the trussrod on my DK2M either

[tonemonster]

sometimes its a close fit, you need to make sure the allen is aligned square to the hole, and its aligned so the hex pattern is oriented correctly.

[advennt]

I'll give it another go later today. One more question, just to be sure... If I tighten the truss rod nut (turn clockwise when looking down from the headstock to the body), will the neck arch downwards or upwards?

[ginsambo]

All trussrods and engines to my knowledge turn clockwise. Its a right hand thread, so if you turn it clockwise looking down the neck, toward the body, from the headstock it will start to backbow. Turning anticlockwise will bring relief.