Originally Posted by: Sarah0203
Does anyone know what size allen key is needed to adjust the truss rod in an American Telecaster?

The Warmoth top adjust tele neck uses 4mm or 5/32"

I presume they're doing that to Fender specs, but they may not be.

I don't think sets of Allen keys are expensive...or you could take the neck/guitar to the hardware shop & find out what fits.

Good Luck.