Sta-Kon C33U NON-INSUL RING C33 WITH 90 DEG BEND

The C33U is sized for 12-10 AWG conductor. Stranded building wire or appliance cord in that range crimps into the barrel; anything smaller than 10 AWG solid or larger than 12 AWG will either loosen in the barrel or not seat, so step to a different barrel size for those runs.

The 90 degree bend on the C33U turns the ring tongue perpendicular to the wire barrel, so the conductor can run parallel to a panel wall or motor frame while the ring lands flat on a stud or terminal block. That keeps you from putting a sharp bend in the conductor itself in a shallow box or tight enclosure. If the stud faces the same direction the wire runs, a straight ring terminal is the simpler choice.

It is a non-insulated terminal, bare copper with no sleeve over the barrel. That means the crimp area and any exposed strands need to be covered by you, typically with heat shrink or a nylon snap-on sleeve, where the connection sits near grounded metal or other energized terminals. In a terminal block with per-pole barriers, bare is usually fine as installed.

The C33U barrel is copper, which makes it a copper-only terminal. Use it on copper conductors. Aluminum conductor needs a terminal rated AL or AL9CU with the appropriate inhibitor compound, because copper against aluminum sets up galvanic corrosion at the crimp.

Order it as Sta-Kon C33U. The U suffix is the version of the C33 ring with the 90 degree bend formed in the tongue, so a plain C33 callout on a drawing is the straight version and will not land the same way on a side-facing stud.

Non-insulated barrels like the C33U are crimped with a non-insulated (open barrel style jaw) die, not the color-coded insulated-terminal nest. Using an insulated-terminal die on a bare copper barrel under-forms the crimp. Match the die to the 12-10 AWG range the terminal is sized for.