High Quality Uninsulated Ring Terminal for Electrical Wiring - Copper Socket Terminals with UL Certification

We needed something for a batch of panel builds where the standard nylon-insulated terminals just add bulk in tight spots, and these bare copper rings fit the bill for that—cold-pressed from solid copper, not stamped from some thin sheet you'd worry about cracking under the screw.

The UL mark on these is what actually pushed the order through, because our QC keeps flagging non-certified terminals in incoming inspections and it's a headache to swap them out after assembly, so having that on file saves us a round of documentation.

Sizes run form #4 up to 1/2" stud, which covers most of our distribution blocks and breaker lugs, and wire range handles 22 AWG up to 10 AWG—roughly 0.5 to 6 mm²—so our company can use them for control wiring and smaller power circuits without switching supliers.

One thing you'll notice handling them is the bare copper finish tarnishes fast if you leave them out, but that's typical for unplated terminals and it doesn't affect conductivity once crimped (usually 2-4 weeks before we notice any discoloration).

We're ordering a mix of sizes to test, but the real reason we went with these is the supplier actually stocks the UL certs for each batch without us chasing them down—most vendors just claim compliance and then you're waiting weeks for the COA.

Anyway, they're not great for outdoor use without additional sealing, but for indoor panels and OEM assemblies where space is tight, this is pretty much the standerd choice.