Sta-Kon RBT873 INS FLUOR RING TERM, 22-18, 1/4, CL

The RBT873 is a 1/4 inch ring terminal, so it lands on a 1/4-20 stud, screw, or terminal block post. A ring tongue has to be slipped over the stud rather than pushed in sideways, so plan on removing the nut or washer at the landing point. If you need to break a connection without pulling the hardware all the way off, a spade or flanged fork tongue is the better choice in that spot.

Yes. The RBT873 insulated ring terminal carries a 600 V rating and is UL recognized under file E9809, which covers the usual commercial control, panel, and motor-circuit work at 600 volts or less.

The insulation is the whole difference. The RBT873 uses a fluoropolymer sleeve instead of vinyl or nylon, which is what you specify when the termination sits in high heat, near solvents or fuels, or in a corrosive atmosphere where vinyl would soften and nylon would degrade. For dry interior panel work at room temperature a standard vinyl or nylon insulated ring will do the same electrical job for less money; the fluoropolymer version earns its place in engine compartments, process areas, and hot equipment enclosures.

The barrel is copper, so it is intended for stranded copper conductors. Do not crimp it onto aluminum wire; that pairing needs a terminal specifically marked AL or AL9CU along with the proper inhibitor compound.

Country of origin on the RBT873 is the United States, which is what government, transit, and institutional specs with domestic content language usually need documented. Order by the manufacturer part number RBT873 so the origin on the submittal matches the part that ships.

Blue is the color code on the RBT873, and crews use it the same way everywhere: color identifies the terminal's wire range at a glance so an installer picks the right barrel and the right crimp die without reading the bag. If you standardize a panel shop or MRO cart on Sta-Kon, keep the colors sorted in the bin and the crimp tool nest matched to the color being used.