Sta-Kon RB1153 INS NYL FORK TERM 18-14 No10 BLUE

The RB1153 is sized for 18 to 14 AWG stranded copper conductor. The blue nylon insulation is the standard color code for that range, so on a panel where you also run 22-16 (red) and 12-10 (yellow) terminals, the blue barrel tells an inspector at a glance which gauge went in. Going outside 18-14 means a loose crimp or a barrel that won't accept the strands.

It's a No. 10 stud/screw terminal. The fork slot drops over a #10 terminal screw without fully removing the screw, which is why fork (spade) terminals are preferred on crowded terminal strips and barrier blocks where you'd otherwise have to pull the screw out to land a ring tongue.

Yes. The insulation on this blue nylon fork terminal carries a 600 V rating, which covers typical motor control, lighting control, and panel wiring. It is UL recognized under file E9809.

Use the fork, like the RB1153, where the connection may need to be serviced or where the screw head can't easily be removed, as on densely packed barrier strips. Use a ring tongue instead on vibration-prone equipment or anywhere a captive connection is required by spec, since a fork can be pulled off a loosened screw while a ring cannot. Both land on a No. 10 screw in this size.

The current replacement product ID for the RB1153 is 7TAI029810R0010. If your spec sheet or purchase order lists either designation, you're referring to the same 18-14 AWG, No. 10 blue nylon fork terminal.

Country of origin on the RB1153 fork terminal is the United States, which matters on federally funded, military, and many institutional procurement packages that carry domestic sourcing language. It is also UL recognized under file E9809.

The barrel is copper and sized for 18-14 AWG, so it needs the blue (18-14) nest of an insulated-terminal crimp tool. Sta-Kon terminals are designed around Sta-Kon crimp dies, and using a mismatched nest, or a bare-terminal tool on an insulated barrel, crushes the nylon and gives you a connection that fails pull-out. Match the die color to the terminal color and the crimp will be right.

Nylon, as used on the RB1153, resists abrasion and tearing better than vinyl and handles higher temperatures, so it holds up where conductors are pulled through wireways or flexed during panel service. Nylon-insulated barrels also tend to keep their shape through the crimp rather than splitting at the funnel entry.