B-Line Eaton series strut fittings and accessories, 3.93" Height, 3.5" Length, 1.62" Width, 1.10lbs, Aluminium, Six hole double corner angle, 90 deg,

The B120AL is a six hole double corner angle bent at 90 degrees, used to tie two runs of strut channel together at a right angle. Because it is a double corner angle with six holes, it picks up bolt points on both legs rather than a single face, which is what you want when the joint has to carry load in more than one direction, such as a trapeze hanger corner or a rack upright to base connection.

Aluminum, both in material and finish. That matters on two counts: it is lighter than a steel fitting of the same shape, and aluminum is the usual pick where corrosion is a concern, such as damp, outdoor or wash-down areas. If your job spec calls for hot dip galvanized or stainless steel hardware, this is not the fitting for it.

The material is 1/4 inch thick. That is a heavy section for a strut fitting, and it is the number to check against the drawing when an engineer has called out a minimum bracket thickness for the connection.

It measures 3.93 inches in height, 3.5 inches in length/depth and 1.62 inches in width, and weighs 1.1 lb. Use the 3.93 and 3.5 inch leg figures when you are checking clearance in a tight corner or against an obstruction near the joint, since the fitting projects along both channel runs.

The B120AL is sold as the fitting only, a single aluminum corner angle. Channel nuts, bolts and washers are separate, so order hardware to suit your strut size and, if you are in a corrosive environment, in a material that matches the aluminum fitting rather than plain zinc plated steel.

A flat 90 degree angle bolts to one face of each channel and is fine for light bracing where the load is in a single plane. A double corner angle like the B120AL wraps the corner and gives six bolt holes across both legs, so the joint resists twist and side load as well as straight shear. For framed structures, equipment supports and anywhere the corner has to stay square under load, the double corner angle is the right call.

Order by the Eaton B-Line part number B120AL. That designation covers the aluminum six hole double corner angle at 90 degrees in 1/4 inch material, and there is one configuration of it, so there is no finish or size suffix to add.