B-Line B297-12ZN Eaton series strut fittings and accessories, 6.25" Height, 12" Length, 1.62" Width, 4.85lbs, Steel, Number of mounting holes (2) 9/16 in diameter (vertical), Bracket, Uniform load capacity 1660 lb, Electro-plated

The B297-12ZN carries a uniform load capacity of 1660 lb. That is the figure to design against when you are hanging conduit runs, cable tray drops, or equipment off a strut channel with this bracket. Anything approaching that number should be checked against the strut and the anchor into the structure, since the weakest link in a strut assembly is usually the fastener into concrete or steel, not the bracket itself.

The mounting holes are 9/16 inch diameter, which is the standard strut channel hole size and takes a 1/2 inch bolt with clearance. Standard 1/2 inch strut nuts, channel nuts, and hex head bolts in the same series will pass through without drilling.

The B297-12ZN is steel with an electro-plated finish, which is a thin zinc coating meant for dry indoor service: mechanical rooms, electrical rooms, interior ceilings, plant interiors. For exterior work, wash-down areas, parking structures, or anywhere with regular condensation, specify a hot-dip galvanized or stainless version of the fitting instead. Electro-plate will surface rust once it is exposed to standing water or chlorides.

It is a steel bracket for the Eaton B-Line strut fitting system, used to tie strut channel to a wall, column, or another length of strut so you can hang conduit, cable tray, pipe, or equipment off it. At 12 inches long with a 1660 lb uniform load rating, it suits cantilevered arms and bracket supports off a wall-mounted strut run rather than light single-conduit hangers, where a simple clamp or a short pipe strap is the cheaper answer.

The B297-12ZN is supplied as the bracket alone. Channel nuts, bolts, washers, and any anchors into concrete or steel are ordered separately, so size those to the 9/16 inch holes (1/2 inch hardware) and to whatever you are anchoring into.

Order it as Eaton B-Line B297-12ZN. The ZN suffix is the electro-plated zinc finish; if your spec calls for a different coating on the same bracket, that changes the suffix, not the B297 base number.