Blackburn FB-4243230-1 4X(24X32/30) TC FLAT BRAID

It's a flexible flat braid bonding connector with a single bolt hole, used to bond or ground equipment where the connection has to flex or absorb movement and vibration, such as across hinged panels, enclosure doors, transformer pads, or expansion joints. The conductor is a flat flexible braid rather than a solid bar, so it carries fault current while still allowing movement. Selling unit is each, so one braid per order.

The conductor is tin-plated copper braid built to ASTM B33, which is the standard covering tin-coated soft copper wire for electrical purposes. The tin coating is what keeps the strands from oxidizing and keeps contact resistance stable in damp or outdoor enclosures, which is why plated braid is normally specified over bare copper for grounding straps exposed to weather.

One. It's a 1-hole terminal braid, so each end lands on a single bolt or stud. If your spec calls for a two-hole NEMA pad pattern to resist rotation on a bus or ground bar, this isn't the right part and you'll want a two-hole braid or lug instead.

That is Blackburn's braid construction call-out, printed as 4X(24X32/30) TC FLAT BRAID, describing how the tin-plated copper strands are grouped and woven into the flat braid. When you're matching an existing strap or a drawing callout, order against the full part number FB-4243230-1 plus that construction string, since braid constructions differ between part numbers in the FB series.

Use a flexible braid like the FB-4243230-1 anywhere the two bonded points can move relative to each other: enclosure doors, hinged dead fronts, vibrating machinery, gen sets, seismic or thermal expansion joints, and rail or transit bonds. A solid bar or a rigid lug and conductor is fine where both ends are fixed. Rigid connections on a moving joint work-harden and eventually crack, which is the failure the braid is there to avoid.

Country of origin is the United States, which matters if you're buying under a Buy American or domestic-preference clause on a government, transit, or utility project. Blackburn is the brand on the part and FB-4243230-1 is the manufacturer part number to put on the submittal.

The braid is sold as the connector alone, one each. Plan on supplying the bolt, nut, and washers sized to the terminal hole and the stud or pad you're landing on, plus any anti-oxidant compound your spec requires at the joint.