Sta-Kon CC2-TB NON-INS BTT SPLICE 12-10AWG LEN .72

The CC2-TB is sized for 12-10 AWG stranded copper wire on both ends. Both conductors have to fall in that range, so a 14 AWG lead crimped into it will pull out even if the crimp looks right. For 14-16 AWG you need the next barrel size down in the Sta-Kon line.

It is a non-insulated barrel, bare copper with no sleeve. After crimping you have to insulate it yourself with heat shrink or tape to get back to the 600 V rating of the circuit, or install it inside an enclosure or boot where insulation is provided some other way. If you want the covering built in, use an insulated butt splice instead.

Yes, within reason. The splice is rated to 150 C, which covers furnace and air handler wiring compartments and motor lead splices where ordinary nylon-insulated terminals would soften. Just remember the barrel is bare, so whatever you insulate it with has to carry the same temperature rating or it becomes the weak link.

The Sta-Kon CC2-TB carries UL file E9809 and is rated 600 V, which is what an inspector or facility electrical spec usually wants to see on a splice used in building branch circuits, control panels, and equipment wiring. Keep the barrel within its 12-10 AWG wire range and insulate it after crimping for the rating to mean anything in the field.

A butt splice gives you an in-line joint with a small profile, which is what you want inside equipment, in a wireway, or anywhere a twist-on connector would not fit or would be subject to vibration. Wire nuts are quicker in a junction box and reusable. The CC2-TB suits inline 12-10 AWG stranded runs where the splice has to stay slim and take heat up to 150 C.

Overall length is .72 inch, so the finished splice with heat shrink over it runs roughly three quarters of an inch plus whatever the shrink adds on each end. That tucks into a standard device box or a panel wireway without much fuss, but it is longer than a bare crimp sleeve, so allow for it when you are splicing several conductors in one small box.

Yes. Country of origin on the CC2-TB is the United States, which matters if you are buying against a government, military, or domestic-preference procurement spec.