Sourcing for Metric Z-axis upgrade.

looking for parts for M8 x 1.00mm metric rod upgrade.
the threaded rods are easy.

the problem is finding Coupling nuts with the 1.00 pitch. they spin on the rods and carry the weight.
see examples here.
http://www.mcmaster.com/#hex-nuts/=ts84mu

if anyone has sourced these link me in please.

 

I've never found one, nor do I see a benefit of 1.00 pitch vs the more common 1.25

 

Try these... all in one package....

http://www.robotdigg.com/product/8/Threaded-Rod-NEMA17,-280mm-Tr8*8mm-Acme-Leadscrew