RG174 is a thin co-axial cable that is popular for lightweight portable HF antennas. However finding solderable connectors for this cable is often quite a challenge. After a long search for a suitable product, SOTABEAMS now stocks such a connector. The connector works with a variety of other thin co-ax cable types including LM100.
More Information - https://www.sotabeams.co.uk/uhf-plug-solder-pl259-for-rg174/