That is a 'G' connector, and is intended for test only. They do not meet the FCC requirements for CATV systems.
near the bottom on the right hand column has the usual 'f' to 'G' adapter that was used on service benches. they describe it as "F" Quick Connect Adapter (CRF) F-QC "F" quick connect adapter converts 'screw-on' male to 'push-on' male. As usual, their descriptions are vague.
is a direct link to the photo.