Does anyone know if the H9 Pro Link threads are actually 4-40 or might they be 3mm? These look VERY similar to Lunsford Turnbuckles used in the RC Car World, and the Lunsfords are threaded 3mm (per Lunsford's web.site). I know Horizon states that the H9s are 4-40, but I just wanted to confirm if this is correct before purchasing them. (Tower mis-states that the Lunsfords are 4-40).

Thanks in advance!

Anyone? []

I know for a fact that the Lunsford are metric as I used them on my DPM Edge 27%. Just use the self threading stuff for 4-40 and they work great. The H9 are probably indeed 4-40 as they are designed for aircraft. The Lunsford are for cars which are all metric.

bought ten of them for a big sukoi and will never run those pieces of crap in anything ever again.two failed during radio range test on the ground before it ever was flown.took all them off and trew them in the trash

H9 ones are self tapping and not 4-40 machine,
I have seen lunsford ones also was thinking about ordering some instead of h9 ones.

3dd How did they fail?

the bearing races were too loose i guess but all the bearing balls fell out