Sta-Kon RB2217-200M EXP INS VIN LKG FRK TRM 18-14 BELT

It crimps onto 18-14 AWG stranded or solid copper conductor. The blue vinyl insulation is the standard color code for that gauge band, so if you are pulling 16 AWG control wire or 14 AWG branch wire, this is the right barrel size. For 22-16 AWG you want a red terminal instead, and for 12-10 AWG a yellow one.

Yes. The terminal carries UL file E9809, which is what an electrical inspector or a spec-driven MRO buyer will want on record for a control panel or switchgear termination.

A locking fork has turned-up tangs at the ends of the fork tines. Once the screw is torqued down the tangs catch under the screw head, so the terminal cannot vibrate sideways off the stud the way an open spade can. You still get the spade advantage of sliding under a partly backed-off screw without removing it, which is why these are used on motor starters, terminal strips, and control panel barrier blocks. A ring terminal is more secure still, but the screw has to come all the way out to install it.

The barrel is copper, so they are for copper conductor only. Do not crimp aluminum wire into them, that needs a dual-rated AL9CU connector with the appropriate inhibitor compound.

It is a belted terminal, meaning the terminals are supplied on a carrier strip rather than loose in a bag. That is what feeds a semi-automatic bench crimping machine. If you are doing hand crimping in the field, loose-piece terminals are the easier buy.

Insulated vinyl terminals in the 18-14 AWG range crimp with a standard insulated-terminal tool using the blue nest or die station. Crimping an insulated barrel in a bare-terminal die will split the vinyl sleeve, so match the die to the color band.

Yes, country of origin is the United States. That matters if you are bidding public work with domestic sourcing requirements on electrical components.