Sta-Kon RB863M INS NYL RNG TRM 18-14 No8 BLU MYLAR

The RB863M is sized for 18-14 AWG stranded copper conductor, which is the blue insulation color band on standard crimp terminals. If you're terminating 16 AWG control wire or 14 AWG branch wiring in a panel, this is the right barrel size. For 22-16 AWG you need a red terminal instead, and for 12-10 AWG a yellow one.

The ring tongue is sized for a No. 8 stud or screw, per the RB863M designation. That covers the typical 8-32 terminal block screw and grounding screw found in panelboards and control enclosures. If your terminal strip uses a 10-32 screw, the No. 8 ring will not pass over it, so step up to a No. 10 ring terminal.

Rated 600 V and carried under UL file E9809. That covers 120/208, 240, 277 and 480 V panelboard and control-circuit terminations. The rating applies to the terminal itself; the conductor insulation rating still governs the circuit.

The barrel is copper, so it's for copper conductor only. Crimping copper onto aluminum wire creates a dissimilar-metal joint that corrodes and loosens over time. Aluminum branch or feeder conductors need an AL9CU or AL-rated connector instead.

A ring terminal like the RB863M has to be slid over the stud, so the screw must come fully out, but once it's torqued down the connection cannot back off the screw if it loosens. A spade or fork terminal slides in from the side without removing the screw, which is faster on crowded terminal strips but can pull free. For permanent panelboard, grounding, and vibration-prone connections, the ring is the one to specify.

The RB863M uses a nylon insulating sleeve rather than vinyl. Nylon is tougher against abrasion and cut-through when wires are pulled through a harness and holds its shape better at elevated temperature than vinyl, which is why it's the usual choice for automotive and wiring harness work. Sta-Kon lists harness, panelboard, telecommunications, and automotive as the intended applications.

Yes. Insulated barrel terminals in the 18-14 AWG range need an insulated-terminal crimp tool with the color-coded blue nest, which compresses the barrel and the nylon sleeve together without cutting the insulation. A bare-terminal or non-insulated die will split the sleeve. Sta-Kon terminals specifically are designed around their matching hand or power crimp tooling.

Country of origin is the United States, which matters on federal, military, and Buy American funded projects where domestic-source documentation is required for electrical components.

Order Sta-Kon RB863M. That is the manufacturer part number for the nylon insulated ring terminal, 18-14 AWG, No. 8 stud, blue.