Sta-Kon RB1163 INS NYL FORK TERM 18-14 BH1/4 BLUE

The RB1163 is sized for 18 to 14 AWG stranded copper wire, which is the standard blue colour code band on insulated terminals. Blue nylon insulation is the visual confirmation you have the 16-14 range body rather than a red 22-18 or yellow 12-10. Outside that range the crimp will not hold, so step to the matching colour terminal instead.

It is a 1/4 inch stud fork terminal (the BH1/4 in the part description). The open fork slips over a 1/4 inch screw or stud that is already partly backed out, so you do not have to remove the screw from a terminal block or breaker to land the wire.

Yes, 600 V is the rating on this nylon insulated fork terminal, which covers standard commercial and industrial control and power wiring at 480 V and below. It carries UL file E9809.

Fork terminals like the RB1163 go on and off without pulling the screw out, which is why panel builders and electricians use them on terminal strips they expect to service. A ring terminal is captive once the screw is tightened, so it cannot vibrate off the stud. For equipment subject to vibration or where code or a spec calls for a captive connection, use a ring; for serviceable control wiring on 1/4 inch screws, the fork is faster.

Copper barrel with nylon insulation. That makes it a copper-wire-only terminal, so do not crimp it onto aluminum conductors, which need a terminal rated AL or AL/CU with the proper inhibitor.

Manufacturer part number RB1163 from Sta-Kon, described as an insulated nylon fork terminal, 18-14 AWG, 1/4 inch stud, blue.

Nylon is the tougher of the two insulation materials, so it resists abrasion and cut-through better where wires are pulled through a panel or flexed during service, and it handles higher temperatures than vinyl. The RB1163 uses nylon insulation over a copper barrel and is rated 600 V.

Yes. Country of origin on the RB1163 fork terminal is the United States, which matters on government and institutional work carrying domestic-content requirements.