Identifying a coaxial/RF connector

It looks to me like an MCX connector. For example, this one from Amphenol:

I'm not sure why this one doesn't seem to have the dielectric protruding around the center contact like yours, when it is shown in the general diagram below.

The 3.5 mm inner diameter you measured is pretty close to correct:

(Image source: Amphenol)

It looks like an MCX. The inner diameter of the receptacle is spec'd at 3.45 +/- 0.03 mm, which is pretty close to your drawn width of 3.3 mm, and has some measurement error. The receptacle depth is spec'd at 4.0 mm, which matches your drawing. See dimensions labeled B and G in this MCX spec sheet:

http://www.xmultiple.com/Suggested-MCX-5.htm