Originally Posted by kimokk
Where do you get an M14 coupling nut at? I went to my local Ace hardware and they only had SAE style and not the larger version. Also, the large spark plug socket made by Husky does not allow for the reverse socket drive trick since it has a circular hole on the inside not the standard 3/8 inch square socket fitting..
Any industrial fastener place that stocks metric carries them.
I just went to my local one.
It's interesting that McMaster Carr doesn't carry that size but went looking I found that the M12 coupling nut is 22mm across as well see link http://www.mcmaster.com/#metric-coupling-nuts/=l0t8h9