Which macros define spaces around table and float environments?

Question

I am trying to define the length of vertical space between tables and text globally in my document. So far, I have been using

    \setlength{\intextsep}{0cm}
    \setlength{\floatsep}{0cm}
    \setlength{\textfloatsep}{0cm}
    \setlength{\intextsep}{0mm}
    \setlength{\belowcaptionskip}{0cm}
    \setlength{\abovecaptionskip}{0mm}

in my preamble. Moreover, I also use the caption package, which I define as follows:

\usepackage[%
    font=small,
    textfont=bf,
    nooneline,
    justification=raggedright,
    format=hang,
    labelsep=quad,
    skip=0mm
]{caption} 

I don't want the space to be zero, of course, but even if it is set to zero, I still have white space between tables and text as well as caption and text. This leads me to believe that there are more macros involved through whom the space between tables/captions and text is defined. I couldn't find a complete list of the macros involved, however (I looked e.g. here and here).

Are there still macros missing from the list above that potentially change the spacing between tables/captions and text?

EDIT:

A typical table in my document:

\begin{table}[H]
\begin{center}
\begin{tabular}{lll}
1 & 2 & 3 \\
\end{tabular}
\end{center}
\caption{...}
\label{...}
\end{table}

Where option H requires the float package.