B-Line Eaton series strut fittings and accessories, .23" Height, 3.5" Length, 1.62" Width, .37lbs, Aluminium, Two hole splice plate, Thickness 1/4 in,

The B129AL is a flat two hole splice plate used to join or reinforce strut channel sections at a butt joint. You bolt it across the seam through the two holes with channel nuts and hardware, which carries the connection across the break instead of relying on the cut ends. It is a plate only, so channel nuts, bolts and washers are separate items.

Aluminum, both in material and finish. That matters on two counts: aluminum plates are lighter to handle overhead, and mixing an aluminum fitting with plain steel channel and steel bolts puts dissimilar metals in contact, which is worth considering in damp or exterior locations. On aluminum strut it keeps the run consistent.

Material gauge is 1/4 inch, and overall height is .23 inch, so it is a flat plate that lands directly on the face of the channel with no formed offset. Because it adds a quarter inch of stack at the joint, allow for that if the plate falls where a clamp, hanger or trim has to pass over it.

A two hole plate like the B129AL puts one bolt on each side of the joint, which is the right choice for light duty splices and for alignment where the load is mostly in compression or carried by nearby supports. If the splice is unsupported and has to carry bending across the seam, step up to a longer four hole plate or a splice clamp so each side of the joint gets two fasteners.

Order it as B129AL, an Eaton B-Line series strut fitting. The AL suffix is the aluminum version, so quote the full designation when matching an existing run of aluminum fittings rather than just the 129 base number.