Blackburn 54865CK FIGUR 6 CONNECTOR

It's a compression type. The 54865CK is part of Blackburn's E-Z-Ground compression grounding line, so it's crimped onto the conductor with a compression tool and die rather than tightened down with a set screw or bolt. That means it's a permanent, irreversible termination, which is what most grounding electrode and bonding specs call for. If you need a connection you can open up later for testing or re-pulling, you want a mechanical bolted grounding connector instead.

Copper. That matters for grounding work because a copper connector on copper conductor avoids the dissimilar-metal corrosion you get when you mix metals at a ground connection, especially in direct-burial or damp locations. The part is made in the United States.

Yes, this is a crimped fitting, not a screw-down lug. You'll need a hydraulic or battery compression tool with the matching die for the connector's die index. Plan the tool into the job before the connector shows up on site, because there's no way to make up a compression grounding connector by hand.

No. Once a copper compression grounding connector like the 54865CK is crimped, it's deformed permanently around the conductor. If the run changes, cut the connector off and crimp a fresh one on clean conductor. Reusing one leaves you with an unreliable ground path, which is the one connection you can't afford to have marginal.

It's sold each, so the quantity you enter is the number of connectors you get. For a ground grid or a service bonding run, count your terminations and order to that number, plus spares for miscrimps, since a compression connector that goes on wrong has to be cut off and replaced.