Sta-Kon C481 NON-INS RECT RING TERM, 12-10, No6

The C481 ring terminal takes 12 to 10 AWG stranded copper conductor. A 14 AWG or smaller wire will not fill the barrel and won't hold a reliable crimp, and anything heavier than 10 AWG won't enter it. For those sizes you need a different barrel size in the same terminal family.

Yes, it carries a 600 V rating and is UL recognized under file E9809, which covers the typical motor control, panelboard, and lighting circuit work an electrical contractor does. Since the terminal is non-insulated, the conductor insulation and any heat shrink or boot you add are what provide the dielectric barrier at the joint.

The terminal body is copper, so it's intended for copper conductor only. Crimping copper onto aluminum wire without a dual rated AL/CU connector risks galvanic corrosion at the joint. For aluminum branch or feeder conductors, use a lug marked AL9CU or AL/CU instead.

Non-insulated is the right call when you want to see the crimp, when you plan to add your own heat shrink or a terminal boot, or when the lug sits in a tight enclosure where a nylon or vinyl sleeve would add bulk. An insulated terminal is the better pick for exposed field terminations where nothing else will cover the barrel. The C481 is the bare version, so plan on sleeving it yourself if the joint needs insulating.

The C481 has a rectangular tongue, which gives you a flat sided pad that seats squarely against a terminal block or busbar and resists rotating under the screw. A round tongue is fine on a single post; a fork or spade slides out from under a loosened screw, which is why ring styles are preferred on vibration prone equipment and grounding points.

It ships as a bare copper terminal, nothing else. You supply the #6 screw or nut at the stud, any heat shrink or boot if the joint needs covering, and a crimp tool matched to the 12-10 AWG non-insulated barrel. A non-insulated barrel wants a crimper with the correct die nest, not the plastic jaw tool used on insulated terminals.

Country of origin on the C481 is the United States, which is what institutional and government procurement typically needs documented on electrical connectors. Pair that with the UL E9809 file reference for submittal packages.

It works anywhere you have 12-10 AWG copper landing on a No. 6 stud or screw at 600 V or less, which covers most lighting circuits, control wiring, and equipment ground screws in a commercial panel. Openings with heavier conductor or larger studs need a different size, so most facilities keep two or three barrel/stud combinations on the shelf rather than one.