Sta-Kon C71 NON-INS RING TRM 12-10 BOLT 1/4

The C71 is sized for 12 to 10 AWG conductors. If you are terminating 14 or 16 AWG, the barrel will be oversized and the crimp won't hold; step down to a terminal rated for that smaller range instead.

Yes. The C71 is built with a 1/4 inch bolt-size ring tongue, so it lands on a 1/4-20 stud or terminal screw. It will slip over a smaller #10 screw too, but the ring will not be captive against the washer face, so match it to the 1/4 inch stud it was made for.

It is a non-insulated terminal, bare copper with no sleeve over the barrel. In a tight panel or junction box where terminations sit close together, you will want heat shrink or tape over the barrel, or an insulated ring terminal instead. Non-insulated is the right pick where you are using a boot, a shrink sleeve, or where the terminal lands under a cover with clearance.

600 V. That covers standard 120/208, 277 and 480 V building branch circuits as well as low-voltage control and motor connections, so it is usable on most commercial power and control terminations.

Yes, it carries UL file E9809. For inspected work on institutional or commercial jobs where the terminations have to be listed components, that file number is what you cite.

A ring tongue has to come off the stud entirely to be removed, which is exactly why it is specified where vibration or a loose screw would let a connector walk off, such as motor leads, grounding studs and equipment terminal blocks. A fork or spade slides out under a loosened screw, which is faster for service but less secure. If the connection is permanent or subject to vibration, the ring terminal is the correct type.

The barrel and tongue are copper. It is a copper-only terminal, so use it on copper conductors; aluminum wire needs a connector specifically listed AL/CU for that service.

Yes, country of origin is the United States. That matters on government, military and federally funded work where domestic-sourcing requirements apply to the installed components.

Sta-Kon C71 is the part number. One model covers the 12-10 AWG range on a 1/4 inch bolt, bare copper finish, so it is a single line item to stock for MRO carts and panel builds rather than carrying separate sizes for 12 and 10 AWG.