Sta-Kon F71U NON-INS BS RING TERM 4 1/4 90 DEG

The F71U is built for 4 AWG conductor. It's a non-insulated copper barrel, so it crimps onto bare 4 AWG stranded wire. Don't try to force a smaller gauge into it - an under-filled barrel won't hold a proper crimp or carry current reliably. Step down to the correct terminal for the gauge you actually have.

Yes. The F71U carries UL file E9809 and CSA 622302. That matters on inspected commercial and institutional work where every termination in the panel has to be a listed connector.

The 90 degree bend on the F71U turns the ring tongue perpendicular to the barrel, so the wire runs parallel to the mounting surface instead of straight at the stud. That's what you want in a tight panel, a motor terminal box, or against a busbar where a straight terminal would force a sharp bend in a 4 AWG conductor right at the crimp. If you have room to approach the stud head-on, a straight ring terminal is the simpler choice.

It's a bare, non-insulated copper terminal - no sleeve, no color-coded barrel. If the application needs the barrel covered, you add heat shrink or an insulating boot separately. Non-insulated is the usual pick when you're crimping heavy conductor and want to inspect the crimp, or when temperature rules out a plastic sleeve.

At 4 AWG this is a heavy-barrel copper terminal, not something a plier-style insulated-terminal crimper will handle. You need a die set rated for 4 AWG copper lugs - a ratcheting heavy-duty or hydraulic crimper. Using the wrong die is the most common reason a listed connector fails inspection.

Yes, country of origin is the United States. That's the detail government, education, and healthcare procurement buyers working to domestic-sourcing rules usually need on file before they'll release a PO.