Sta-Kon RB1203 INSNYL FORK TERM FLG 18-14 No6 BLUE

The RB1203 takes 18 to 14 AWG stranded or solid copper wire. That's the standard blue color code range, and the barrel is blue so you can identify it in a bin or on a crimp die without measuring. If you're terminating 16 AWG control wire or 14 AWG branch conductors, this is the right size; 12-10 AWG needs a yellow-coded terminal instead.

It's sized for a No. 6 screw or stud. The fork slot slides under a loosened No. 6 terminal screw, so you don't have to pull the screw all the way out of a terminal block or device, which is the main reason people pick a fork over a ring tongue. If your block uses No. 8 or No. 10 screws, the slot will be too narrow.

The RB1203 is rated 600 V, so it covers 120, 240, 277 and 480 V control and power terminations within its 18-14 AWG wire range. Nylon insulation also holds up better to flexing and abrasion than vinyl, which is why it gets specified in panel and control cabinet work.

Yes, it's covered under UL file E9809. For an institutional or MRO buyer who needs listed components on a panel build or an inspected retrofit, that's the file number to reference on the submittal.

The flange is a raised lip at the open end of the fork tongue. It keeps the terminal from sliding back out from under a screw head once it's seated, so a vibrating panel or a bumped wire bundle is less likely to pop the connection loose. A plain (non-flanged) fork has no such stop. If your spec calls for a captive connection and you can't take the screw out, the flanged fork is the compromise between a plain fork and a ring tongue.

Use a fork when the screws stay captive in the device or block and you want to land the wire without backing the screw all the way out, which is most control panel and terminal strip work. Use a ring when the connection is on a stud, is subject to heavy vibration, or the spec demands a fully captive tongue. The RB1203 is the flanged fork version for 18-14 AWG wire on No. 6 screws, which splits the difference: it won't walk out as easily as a plain fork.

Yes, country of origin is the United States. That matters if you're buying for a government, education, or federally funded project with domestic sourcing language in the contract.

Sta-Kon RB1203. The R prefix in the Sta-Kon numbering is the 16-14 AWG (blue) series, and the barrel is copper under nylon insulation. Order by RB1203 if you're matching what's already in a panel.