Metallics MWNWT2212 22--12 Tan Wing Wire Connector

Yes. The MWNWT2212 accepts conductors from 22 to 12 AWG, so mixed-gauge combinations within that span, like a 12 with a 14, are inside its range. Total conductor count and combined gauge still have to stay within what the connector can close on, so load it the way the gauge range allows rather than forcing an extra conductor in.

Both are twist-on, insulated splice caps, but the wing style adds molded side wings that give you leverage to drive the connector down by hand. Electricians use them where a lot of splices get made in a shift, or in a tight box where a plier grip is awkward. A plain cap without wings is the smaller-profile choice when box fill is tight. The Metallics MWNWT2212 is the wing type in the 22-12 AWG range.

It will take it. 22 AWG is the bottom of the MWNWT2212's range, which covers thermostat, doorbell, and similar small control conductors. Keep in mind it is a single twist-on insulated cap, not a weatherproof or gel-filled connector, so it belongs in a dry, enclosed box rather than buried or in a wet location.

Order it by manufacturer part number MWNWT2212 from Metallics. That number encodes the configuration: wing-type nut, white/tan family, 22-12 AWG. If you are standardizing a truck stock or a facility MRO bin across gauge ranges, the color plus the part number together keep the wrong size from getting ordered.