4 or 8 Gauge Ring Terminal Gold Plated Car Stereo 4GA Set Screw Xscorpion RT4/8G

This 4 or 8 Gauge ring terminal is gold plated and designed with a set screw that is tightened down to ensure a secure connection. It features a reducer that can be used if needing to use 8-gauge wire instead of 4 gauge. The ring terminal opening is 5/16". Perfect for any car audio, marine, or other wiring installations that require a ring terminal.

eBay