This chrome plated brass cable outlet has rubber grommets for watertight passage of 1/4", 5/16" or 3/8" diameter cables (select size accordingly).
The mounting flange is 1-1/4" diameter and outlet extends only 5/8" from trailer. Attach with #4 screws (not included).
The typical diameters of various coaxial cables are these:
- RG-6/U (double shieded) .270" (~1/4")
- RG-7 .320" (~5/16")
- RG-8/U .405" (~3/8")