ATAUDIO Q8RF Female RCA Connector Ø7.5mm (The pair) - reviews - There is 1 review.

Good quality, Easy soldering
made from metal, solid feel, screw thread works smooth and locks firmly. All in all high quality appearance. Easy to solder, soldering points for + and - are on same level and avoids uneven cable lengh cutting to keep them nicely parallel.
Diameter for cable outlet (7.5mm) is only ideal for strong cable diameters - for usual audio lines too spacey (hence 4 out of 5 stars). Make sure you use large diameter audio cable for perfect fit.