B-Line Eaton series strut fittings and accessories, 3.25" Height, 3.5" Length, 1.62" Width, .73lbs, Steel, Four hole splice plate, Electro-plated zinc

The B504ZN is a flat four hole splice plate for joining two lengths of strut channel end to end. It bolts across the joint through four holes, carrying the connection from one channel into the next so the run continues as one member. It is a plate only, so the channel nuts and bolts that clamp it to the strut are a separate order.

Plan on ordering hardware separately. The B504ZN is supplied as the steel plate itself, with four holes for the fasteners. You will need four channel nuts and four hex head bolts, sized to the strut you are splicing, plus washers if your spec calls for them. Match the fastener finish to the plate so you are not pairing plated steel with a dissimilar coating in the same joint.

Electro-plated zinc on steel is a light indoor-duty coating. It holds up in dry interior mechanical rooms, ceiling spaces, and conditioned plant areas. For a roof, a parking structure, a wash-down area, or anything exposed to weather or chemicals, specify a hot dip galvanized or stainless splice fitting instead; the electro-plated version will show corrosion well before the strut does in those conditions.

A four hole flat plate like the B504ZN is the standard choice for joining two channels in the same plane where the run is supported near the joint. If the splice lands in an unsupported mid-span, or the run carries heavy trapeze loads, a longer multi-hole splice bar spreads the load over more fasteners and more channel length. For turning a corner or joining channels at an angle, a flat plate is the wrong part entirely, and an angle or corner fitting is what you want.

Order it as Eaton B-Line part number B504ZN. The ZN suffix denotes the electro-plated zinc finish, so quoting the full number keeps you from receiving a different finish of the same plate body. It ships as a single plate, not a kit.

Yes. It is part of the Eaton B-Line strut fittings and accessories line and uses the same bolt and channel nut pattern as the rest of that system, so it mixes with B-Line clamps, brackets, and hangers already on the run. If a facility is standardizing on one strut system, keeping splice plates in the same line and the same electro-plated finish keeps the stockroom simple and the joints consistent.