Ring connector needed

I need some ring connectors with an opening diameter of from 0.25 to 0.26 inches. They can be crimp style or solder attachment. Please advise product number(s) for me to consider. Alternatively something like this part CT2232-2 but with the threaded part having a diameter of 0.18 to 0.2 inches. Again the part number (for both red and black versions) would be helpful.



Hello tbabcock123. These ¼” ring terminals are currently in stock. You can narrow down your options by choosing whether you want insulated or non-insulated and choose the wire gauge you prefer. These are stocking binding posts, red and black. Unfortunately, we do not have search parameters available to search out the diameter of the threaded portion. You will need to take a look at the drawings for any of the parts you are interested in.

In looking at the available offerings it looks like the thread size i need is 8-32 and your product # 7018 (or 4108) seems to fit the bill except it’s unclear whether the hex nut head will accept banana plugs. If these products don’t then which of your offerings does? FYI, I’m replacing the banana plugs on an old HP attenuator model # 350D (see photo).

Hello Tom:

If you’re looking for double banana jacks, you’ll want to look at these.

Traditional USA standard binding posts use 0.375" panel holes.

Pomona’s mini-binding post series is 8-32 thread and 1/4" panel hole.

Black: https://www.digikey.com/short/cfv80b3r

Red: https://www.digikey.com/short/c7t9f85d

These are 5-way binding posts so they accept, banana plugs, bare wire cross hole, bare wire wrapped, pin probe/connector cross hole, and terminal lug.

Hi Paul,

The Digi-Key catalog has a warning on the red version that they are no longer manufactured. Does Digi-Key still have them in stock?


I show the part 501-2302-ND as active 7 in stock , 501-2301-ND similar with gold contact is also active 6 in stock