Sta-Kon RB6F POLYCARB INSUL FORK TERMINAL BLUE

The RB6F is sized for 1.5 to 2.5 mm2 conductor, which is 16 to 14 AWG in US gauge terms. The blue insulation is the standard color code for that range, so if you are terminating 16 or 14 AWG stranded control wire, this is the right barrel size. For 22-16 AWG you need a red terminal instead, and for 12-10 AWG a yellow one.

A fork (spade) terminal like the RB6F slides in under a loosened screw without removing it, so it is the faster choice on crowded terminal strips, contactors, and panel blocks where you service connections often. A ring terminal has to be lifted over the stud, but it cannot vibrate off a loose screw. For high-vibration equipment or anywhere a captive connection is required by spec, use a ring. For panel wiring and field service, the fork wins on time.

The conductor barrel is electrolytic copper with a polycarbonate insulating sleeve. Electrolytic copper gives the low-resistance crimp you want on a current-carrying joint, and polycarbonate is a tougher, higher-temperature sleeve than the soft vinyl used on economy terminals, so it resists cracking when crimped and when flexed in service. It is still an insulated crimp terminal, not a sealed one, so it is not a substitute for heat-shrink adhesive-lined terminals in a wet or outdoor location.

Use an insulated-terminal crimper with the blue (16-14 AWG) die nest. The polycarbonate sleeve wants a controlled-cycle insulated crimp tool rather than a generic plier-style crimper, which can split a hard sleeve. Match the die to the color, not to the terminal brand, and the crimp will pull-test correctly.

Order it as Sta-Kon RB6F. That single model covers the blue polycarbonate insulated fork terminal for 1.5-2.5 mm2 wire; there are no finish or size options to specify.

The RB6F fork terminal is made in Sweden. That matters on public and institutional work where country of origin has to be documented on the submittal.