3M 7100164158 3M™ Scotchlok™ Ring Tongue, High Temperature Butted Seam MU6-38RHTK, 6 AWG, 200/Case

It's a single-size terminal: 6 AWG only, minimum and maximum both. In metric that's 13.3 mm2 conductor. There's no range here, so if you're landing 8 AWG or 4 AWG this is the wrong barrel and the crimp won't hold.

The ring opening measures 0.138 in (3.5 mm) across, so it lands on a #6 stud or screw. Anything larger won't pass through the tongue. Overall the terminal is 1.22 in long and 0.63 in wide, which matters if you're stacking several on one stud inside a crowded junction box or motor terminal housing.

Not in the same service. Standard copper and vinyl or nylon insulated ring terminals are built for ordinary ambient wiring. This Scotchlok is steel with nickel plating specifically so it survives to 900 degrees F. Inside an oven cavity, a motor's terminal box, or a fixture running hot, a copper insulated lug will anneal, discolor, and the insulation will crumble. Use the high temperature part where heat is the reason you're replacing the connection in the first place.

No. The MU6-38RHTK is non-insulated, with a butted seam barrel and no sleeve of any kind. If the connection needs to be insulated you have to sleeve it yourself, typically with high temperature fiberglass or ceramic sleeving suited to the service temperature. On oven and motor work that's usually how it's done anyway, since plastic insulation is the part that fails first.

Yes, and it matters more here than on a typical terminal. This is a bare butted-seam barrel in steel, not soft copper, so it needs a non-insulated die (not the color-coded insulated nests) sized for 6 AWG. A heavy hand crimper or hydraulic crimper with the correct non-insulated die is what makes the connection. The beveled mouth on the barrel helps you get all the strands seated before you crimp, which is where most bad 6 AWG terminations start.

200 pieces per case. Part number 7100164158 is the 3M catalog number for the MU6-38RHTK case quantity, so it's sold as a bulk pack rather than by the piece. For MRO stockrooms and motor shops that go through 6 AWG terminations regularly, that's one line item on the shelf.

The steel barrel and tongue are nickel plated for corrosion resistance, which is what protects a steel terminal from rusting the way bare steel would. It's a corrosion-resistant finish on a high temperature part, not a marine-grade tinned copper lug. Country of origin is the United States.