Sta-Kon RBT713 INS FLUOR RING TERM, 22-18, 1/4, CL

The RBT713 is a 1/4 inch ring terminal, so it lands on a 1/4 inch stud, screw or terminal-block post. The closed ring means the stud nut has to come all the way off to install it, which is the trade-off for a connection that cannot vibrate loose the way a spade or fork terminal can.

Yes, it carries a 600 V rating, which covers standard 120/208/240/480 V control panel and motor-circuit wiring as well as low-voltage control and signal work. It is also UL recognized under file E9809.

Fluoropolymer insulation holds up to higher temperatures and to oils, fuels and solvents far better than vinyl, so the RBT713 is the one to use in engine compartments, boiler rooms, process areas and anywhere a vinyl sleeve would soften, crack or chemically attack. For dry interior panel work at normal ambient temperatures, a standard nylon-insulated ring of the same stud size will do the same electrical job.

The barrel is copper, so it is intended for copper conductors only. Crimping copper onto aluminum wire creates a dissimilar-metal joint that corrodes and loosens over time. For aluminum you need a lug specifically marked AL or AL9CU.

Blue is the standard color code for the mid-range insulated terminal size in the Sta-Kon system, which is how an electrician picks the right crimp die nest and the right terminal out of a drawer at a glance. Match the blue nest on your crimp tool to the blue sleeve for a proper crimp.

Use an insulated-terminal crimp tool, not a bare-lug or pliers-style crimper. The fluoropolymer sleeve has to be compressed along with the copper barrel in a single controlled crimp; a pinch crimp splits the insulation and leaves the conductor loose, which is the usual cause of a hot connection at the stud.

Country of origin is the United States, which is what agency, healthcare and education buyers working to domestic-sourcing requirements need on the submittal. UL file E9809 covers the listing side.