Blackburn PAE3921-79-2SCE ALUMINUM PARALLEL CLAMP

The body is aluminum. Blackburn PAE-series aluminum parallel clamps are made for aluminum-to-aluminum connections; putting bare copper against an aluminum body creates a dissimilar-metal joint that corrodes. If your run is copper, use a copper or dual-rated (AL9CU) connector instead.

It measures 2-9/16 by 1-5/8 by 2-1/4 inches (height, length, width) and uses a 1/2 inch bolt. That footprint matters when you are fitting it inside a pole-line hardware cluster or a tight pull box, and the 1/2 inch bolt head tells you what socket to have on the truck.

Bolted. The PAE3921-79-2SCE tightens down mechanically with its 1/2 inch bolt, so you install it with a wrench and no crimp tool, press, or dies. It can also be backed off and re-landed if the conductor needs to move, which a compression sleeve cannot.

It makes a wire or cable splice where two conductors lie side by side in the grooves and the bolt clamps them together, rather than butting them end to end. On grounding and bonding work that is how you tap a ground conductor off a running counterpoise or a grid conductor without cutting the run. The Blackburn PAE3921-79-2SCE is that style of clamp in aluminum.

No insulating cover or boot is included, and the clamp itself carries no insulation material. It lands as a bare mechanical connection, so if the location calls for a covered joint you are adding a separate insulating cover or tape build-up to the install.

Each. The Blackburn PAE3921-79-2SCE is sold as a single clamp, so order one per splice point rather than by carton. For a grounding buildout, count your tap points and order that quantity.

Mexico. That is the stated country of origin, which is the line procurement people need for domestic-preference paperwork and trade documentation on public work.