Blackburn FB2XD24-1 FLEX BRAID 9/16 1H 1.25 X 24 INCH

It's a flat flexible braid bonding jumper, 24 inches long, made of tin-plated copper with a single bolt hole at each end. Flexible braid is what you use where a rigid bonding conductor won't work: across expansion joints, between vibrating equipment and a ground bus, on switchgear doors and hinged panels, or anywhere the two bonded points move relative to each other. The flat braid construction flexes without work-hardening the way a solid bar or a stiff cable lug assembly would.

The terminal pads are punched 9/16 inch, which takes a 1/2 inch bolt with normal clearance. That is the common hole size on ground bus bars and equipment bonding pads, so it lands on 1/2-13 hardware without redrilling. It's a one-hole pad at each end, so there's nothing stopping the jumper rotating on the bolt, torque it down against a flat, clean surface.

It carries UL file E3060 and CSA LR29625. Those listings are what an inspector or a spec writer looks for on a bonding jumper, and they're cited on the product record rather than implied. The braid is also made in the United States, which matters on Buy American and federally funded work.

The conductor is tin-plated copper. The tin slows oxidation on the braid strands and on the terminal pad face, which keeps contact resistance down over time, and it's the usual choice where the jumper sits in a damp, outdoor, or industrial atmosphere, or lands on aluminum or plated hardware. Bare copper works electrically but the surface dulls and the joint needs more attention at maintenance.

The FB2XD24-1 is a fixed 24 inch length, so it suits spans where the two bonding points are a foot or more apart or where you need slack for movement, generator skids, transformer pads, expansion joints in cable tray or busway. Don't coil the excess tight to take up slack on a short span; buy a shorter braid in the same FB2XD family instead. A loose, gentle bow is what lets the braid absorb vibration.