G4RMT makes a good point, about space needed to fit such a wall socket to RG-213, which is thick & rigid coax. The main reason for this is the way coax is made & how it gets it's impedance.
The plastic which separates the centre core from the outer braid is a specific thickness. so if you bend coax too much, you damage that insulator & change the distance between the two brass conductors & change the impedance. The thinner the coax the more flexible it is & RG-213 has many good qualities, but flexibility is not one of them.