Blackburn FB3F24 COPPER FLEX BRAID 24 INCH

The FB3F24 is a 24 inch flexible tin-plated copper braid connector with a two-hole termination at each end. Flat, flexible braid like this is used as a bonding or grounding jumper between two pieces of equipment that move, vibrate, or expand relative to each other, such as switchgear sections, transformer enclosures, bus connections, and equipment ground bonds across expansion joints. You bolt each two-hole pad to the equipment ground pads and the braid absorbs the movement without stressing the connection.

It carries UL E3060 and CSA LR29625 file numbers, so it is a listed/certified bonding component in both the US and Canada. That matters on inspected work where the bonding jumper itself has to be a recognized component rather than shop-fabricated strap.

Two reasons. A flat braid flexes repeatedly without work-hardening, so it survives the vibration and thermal movement that cracks solid or heavy stranded jumpers. And the flat shape gives more surface area for a given cross section, which is why braid is the usual pick for bonding across moving joints and for high-frequency or surge bonding. If the two points you are bonding never move relative to each other, a standard stranded ground conductor with compression lugs is simpler and cheaper. The FB3F24 is the flexible, flat, tin-plated copper option.

The braid is tin-plated copper, and the tin coating is there specifically to slow oxidation on the strand surfaces and at the bolted pads. That makes it the better choice over bare copper braid in humid, wash-down, or coastal environments, and it also keeps the contact surface usable when bolting to aluminum or plated-steel ground pads. Use a suitable joint compound and torque per the equipment ground pad instructions.

Twenty-four inches overall, sold each rather than in a multi-pack, so you order one per bonding point. Mount it with enough slack for a gentle bow, not stretched tight, or the braid cannot do its job of absorbing movement.

The manufacturer part number is FB3F24, Blackburn brand. That is the only configuration on it, so there is no finish, hole-spacing, or length option to specify separately when you order.

Yes, country of origin is the United States. That is the detail institutional and government buyers usually need for Buy American or domestic-preference sourcing documentation on a project.