Where to buy Metric Truss Rod Nuts ?

[guzzler]

Hello, I am wondering if anyone knows where a person can buy a Metric truss rod nut with 6mm threads?

I guess you would say Bullet or Fender style with the hex head to be adjusted with an allen key/wrench. (Not like the Gibson/acorn style.)

6mm thread size is what I need. The current one has 5mm hex head and is a little over an inch long.

Thank you for your help.