Installing an NMO mount couldn’t be easier. Here, I cut a 3/4″ hole into a scrap piece of aluminum. I put the end of the coax through the hole running it all the way through. I then inserted the NMO mount into the hole. I finished by screwing the outer ring on to the NMO mount. If I was installing the NMO mount into a vehicle or vehicle bracket, I would tighten down the outer ring with an adjustable wrench.