Sta-Kon RC363U NYL INSUL RNG TERM 90 DEG 12-10 YEL

The RC363U is sized for 12-10 AWG stranded or solid copper wire. The yellow nylon insulation is the standard color code for that gauge range, so if you're pulling 12 or 10 AWG, this is the right barrel. For 16-14 AWG you'd need a blue-insulated terminal, and for 22-18 a red one.

The RC363U is a ring terminal with a 90 degree bend between the barrel and the tongue, so the wire runs parallel to the mounting surface instead of straight at the stud. That matters in tight enclosures, on terminal blocks mounted flat in a panel, or on breaker and bus studs where a straight terminal would force a sharp bend in the conductor. If you have room to approach the stud head-on, a straight ring terminal is simpler; where the wire has to turn at the lug, the pre-formed 90 saves you stressing the copper.

It's a closed ring (ole) tongue, not an open spade. The tongue has to go over the stud, which means the nut or screw must come off to install it, but once it's on it can't vibrate off the stud. Use a fork terminal instead if you need to slide the lug under a captive screw without removing it.

The RC363U barrel is copper, so it's intended for copper conductors only. Aluminum wire needs an AL9CU or AL-rated connector with the appropriate inhibitor compound; putting bare copper on aluminum invites galvanic corrosion at the joint.

Use an insulated-terminal crimp tool with the yellow 12-10 AWG nest. The crimp is made over the insulation sleeve, not on bare barrel, so a bare-terminal die or a plier-style crimper will crush the nylon and leave an unreliable joint. Nothing else is supplied with the terminal, so the stud hardware comes from the equipment you're landing on.

Country of origin on the RC363U is the United States. For federally funded work with Buy American or BABA language, confirm the documentation your specifying authority requires, but the terminal itself is US origin.

Nylon is the tougher of the two common insulation sleeves on crimp terminals. It resists abrasion and cut-through when terminals are bundled in a raceway or pulled through a panel, and it handles higher temperatures than PVC/vinyl. The insulation on the RC363U is yellow, which also serves as the 12-10 AWG gauge code on the job.

Order by manufacturer part number RC363U from Sta-Kon. That number covers the nylon insulated, 90 degree bend ring terminal for 12-10 AWG copper wire in yellow.