Blackburn SG 66 AL TINPLT STR SPLICE DIE 5/8 6 6

The SG 66 is sized for 6 AWG to 6 AWG, one conductor in each end, which is what the "6 6" in the designation means. It joins two conductors in a straight run, so both ends must be the same size. If your run steps from 6 to a different gauge, you need a reducing splice instead of this one.

Crimp with the 5/8 die, as marked on the connector. Use a compression tool that accepts that die index; the splice is a compression fitting, not a set screw or mechanical type, so it will not hold without being crimped to the marked die.

Yes. It is tin-plated aluminum, and the tin plating is what makes an aluminum-bodied connector suitable for copper as well as aluminum, including mixed copper-to-aluminum splices where the application allows. The barrel itself is aluminum.

Yes, the SG 66 is built to ANSI C119.4, the standard covering connectors for use between aluminum and copper conductors. That is typically the line item an electrical spec or utility standard calls out for compression splices, so it can be submitted against it. It is made in the United States.

It ships bare, with no insulation on the barrel. You supply the covering yourself, whether that's a heat shrink sleeve, an insulating cover, or tape build-up, sized for the 2 inch barrel length plus your conductor insulation overlap.

The barrel measures 2 inches long, so plan for that plus bending room on each conductor. In a tight box or a crowded pull point, lay the splice in straight along the box wall rather than looping it, since a compression splice can't be shortened after crimping.

Compression is the choice where the joint has to be permanent and low-profile: it's crimped once with the 5/8 die and cannot be reopened for troubleshooting. A mechanical set-screw splice is the one to use if you may need to break the connection later or you don't have a hydraulic or battery crimper with die tooling on site. For a direct-buried or inaccessible straight run, compression is the normal call.

Order Blackburn part number SG 66. That's the tin-plated aluminum straight compression splice, 6 to 6 AWG, 5/8 die index. The "SG" prefix with the doubled size digits is how Blackburn designates a same-size straight splice in this family.

Sold each, so order the exact count of splices your run needs. Ordering by the piece is worth noting when you're pricing a job with a handful of 6 AWG joints rather than a full bag.