Blackburn SWB070A3457 FLEX BRAID TNCU 700A 2H 38.1X457MM

It is a flat, flexible tin-plated copper braid connector rated 700A, used to bond or jumper between two bolted terminations where some movement, vibration, or thermal expansion has to be absorbed. Because the conductor is flexible flat braid rather than solid bar, it is the part you reach for across switchgear sections, transformer pads, expansion joints, and ground bus runs where a rigid bar would fatigue the connection.

Two-hole at each termination pad. A two-hole pattern keeps the connector from rotating under fault current or torque, which is why switchgear and utility specs normally call for it on high-ampacity bonding. If your existing pad is drilled single-hole, the 2-hole braid will not land on it without re-drilling or an adapter pad.

The conductor is tin-plated copper. The tin plating slows oxidation at the bolted interface, so contact resistance stays lower over time in damp, outdoor, or corrosive environments, and it is what most utility and industrial bonding specs ask for. Bare copper works electrically but the surface oxide at a bolted joint is the usual reason a connection runs hot after a few years.

No hardware is included. The connector is sold as each, meaning one braid assembly per order, and you supply the bolts, nuts, flat and Belleville washers to match your pad drilling and the torque called out by the equipment manufacturer. Order the hardware with it if you want to complete the termination in one trip.

Order it as Blackburn SWB070A3457, the 700A two-hole tin-plated copper flexible braid at 38.1 x 457 mm. It is manufactured in the United States, which matters if you are working a job with domestic-content or Buy American requirements.

Use the flexible braid wherever the two terminations can move relative to each other: separate switchgear sections, equipment on vibration isolators, outdoor runs that expand and contract, or anything that has to be unbolted and swung aside for service. A solid bar link is the better choice only when both pads are rigidly fixed and aligned, since it has no allowance for movement and will transmit stress straight into the bolted joint. The SWB070A3457 is the flat flexible braid version, 457 mm long, so it also lets you take up modest misalignment between pads.