Sta-Kon RC333M INS NYL RNG TRM 12-10 No.6 YEL MYLR

The RC333M is sized for 12-10 AWG stranded or solid copper conductor. The yellow insulation is the standard color code for that range, so on a panel where crimps are color-sorted, yellow means 12-10 AWG. If you are terminating 16-14 AWG, you need a blue-coded terminal instead, and 22-18 AWG takes red.

It carries UL file E9809. That is the listing an inspector or panel shop will want referenced on a wire termination, so the RC333M is acceptable where UL recognized crimp terminals are called for.

A ring terminal like the RC333M has to come off the stud, meaning you loosen and fully remove the screw to pull the wire. A fork or spade slides out sideways with the screw just backed off. Use the ring where vibration or a critical connection means you do not want the conductor working its way out, which is why rings are normal on grounds, motor studs and battery connections; use a spade where you want fast service access on a terminal strip.

Use an insulated-terminal crimp tool matched to the 12-10 AWG yellow range. The color-coded nests on a standard insulated crimper (red, blue, yellow) correspond to the terminal's own color code, so the yellow die is the one to use here. An uninsulated-terminal or non-insulated die will crush the nylon sleeve and leave an unreliable barrel crimp.

Order Sta-Kon RC333M. That single part number covers the 12-10 AWG, No. 6 stud, yellow nylon insulated ring terminal, with no additional suffix or option to specify.

Nylon insulated, not vinyl. Nylon takes more abuse during pull-through and resists abrasion and solvents better than a vinyl sleeve, which is why it is the common choice in machine builds and under hoods rather than in low-duty residential work.

Country of origin on the RC333M is the United States, which is what a government, institutional or federally funded project will want documented on a wire termination line item.