Sta-Kon C222-TB UNINS LKG FORK TERM 12-10 No10

The C222-TB is sized for 12-10 AWG conductors. Crimping it onto smaller wire like 16-14 AWG will leave a loose barrel that can pull out or overheat, so step down to a terminal rated for that gauge instead.

It is a No. 10 stud terminal, so it slips over a #10 screw or stud on a terminal block, breaker lug, or motor connection. The locking tangs on the fork grip under the screw head so the terminal will not back off the stud once tightened.

It is non-insulated, bare copper. On any connection where adjacent terminals or a grounded enclosure wall are close enough to arc, you need to add your own insulation, typically a nylon or vinyl sleeve or heat shrink slid over the barrel after crimping. If you would rather not add that step, use an insulated fork terminal in the same 12-10 AWG range.

It carries UL file E9809. For an inspected panel build or an institutional spec that requires listed terminations, that is the reference number to cite. It is also made in the United States, which matters on Buy American and federal procurement jobs.

Yes, and that is the main reason to pick one. A ring terminal requires you to pull the screw all the way out to install or service it. The C222-TB locking fork slides in from the side under a loosened No. 10 screw, and its locking tangs resist vibration pull-out the way a plain spade will not. For high-vibration or safety-critical connections where code or spec calls for a captive terminal, a ring terminal is still the right choice.

600 V. That covers standard commercial and industrial branch circuits, control panels, motor starters, and 480 V three-phase work. It is not rated for medium-voltage applications.

No. It is a copper terminal and should be used on copper conductors only. Aluminum conductors need a terminal specifically listed AL/CU along with the appropriate anti-oxidant compound, otherwise you get galvanic corrosion and a hot joint.

Use a crimper with a non-insulated 12-10 AWG die nest, not an insulated-terminal tool. Non-insulated barrels like this one are crimped metal-to-metal, and an insulated die will under-form the barrel and leave a high-resistance joint. Pliers are not an acceptable substitute on a 600 V connection.

No, the tongue is different. C222-TB is a locking fork, open on one side so it can be installed without removing the screw. A ring terminal for the same 12-10 AWG wire and No. 10 stud is a closed ring that the screw must pass through. Both land on the same stud size, but they are not interchangeable if your spec calls out one or the other.