The Invisiware® Radius Ferrule is a concealed, swaged, non-tensioning, through-the-post-mounted fitting that is  suitable for pitched or level runs.

This Invisiware® Radius Ferrule is for 1/8" cable.
Diameter after being swaged is .25"
Length after being swaged is .75"
Head diameter is .537"
Shoulder diameter is .437"