B-Line Eaton grounding lug, Copper alloy, 4/0 wire size, Silicon bronze hardware included, Compression connector lug

The B-Line (Eaton) SB47909 grounding lug is sized for 4/0 conductor. It's a compression connector lug, so the barrel is crimped onto the 4/0 cable rather than set screwed, which means you need the matching compression die and tool for a 4/0 copper connection.

Silicon bronze hardware is included with the SB47909, so the bolt and nut for landing the lug come in the box. Silicon bronze is the usual choice for grounding connections because it resists corrosion at the dissimilar metal joint between the copper alloy lug and a steel structure or ground bar.

Yes, the SB47909 carries a UL certification, which is what an electrical inspector will look for on a grounding electrode or bonding connection in a commercial or institutional job.

No. The SB47909 is a 4/0 compression lug, and a compression barrel only makes a listed connection on the conductor size it's rated for. Undersized cable in a 4/0 barrel won't compress correctly and the connection isn't code compliant. Order the lug that matches the conductor you're actually landing.

A compression lug like the SB47909 is crimped permanently onto the conductor with a hydraulic tool and die, giving a connection that won't loosen with vibration or thermal cycling and needs no retorquing. A mechanical set screw lug installs with nothing but a hex key and can be taken apart later, which is why it's often preferred for temporary work or where the same conductor gets relanded. If the connection is buried, inaccessible, or in a switchgear room where nobody will be back to check torque, compression is the right call.

The SB47909 body is copper alloy and the supplied hardware is silicon bronze, a pairing chosen specifically to keep galvanic activity down at a grounding connection. Bolting copper directly to steel or aluminum with plain steel hardware is where you get trouble; using the bronze hardware that ships with the lug avoids that.