I used a nut on my truss rod allen, but decided to change for these and was a good idea .. the measures work properly ... and now I have to make them!
$3 bucks! nice fit, nice finish works just the way it should.
Nice to know these are around when required. Cheers.
I build my own truss rods, but the nut is much easier to buy than to make. I haven't had any issues with these nuts. Great product!