B-Line Eaton series strut fittings and accessories, 1.62" Height, 4.48" Length, 2.35" Width, .63lbs, Aluminium, Two hole closed angle, 45 deg, Thickne

The B155AL is a two hole closed angle fitting bent at 45 degrees, used to join two runs of strut channel at a 45 degree corner. Each leg carries one bolt hole, so it makes a two-bolt connection between the channels. It is aluminum, 1/4 inch thick, and weighs .63 lb.

The holes are 9/16 inch diameter, which is the standard strut fitting hole for 1/2 inch channel bolts or hardware. Bolts, nuts and channel nuts are ordered separately.

Overall the fitting measures 4.48 inches in length, 2.35 inches in width, and 1.62 inches in height. Worth checking against your channel run before you order if the corner is tight to a wall or another trade's work.

Aluminum, in both material and finish, so there is no plating or paint to chip and it will not rust the way a plain steel fitting does. That makes it a common pick for damp or washdown areas and for runs where crews want the lighter part overhead. At .63 lb it is light to handle on a ladder.

A closed angle like the B155AL has its two legs formed toward each other so the channels meet on the inside of the corner, forming the 45 degree bend itself. An open angle turns the other way and is used where the channel needs to continue past the joint. Pick by which side of the corner your strut has to sit on, because the two are not interchangeable in the same position.