B-Line B54-240 SS6 Eaton series strut channel, .81" channel height, 240" channel length, 1.62" channel width, Steel, 14 Gauge, B54 channel type, Stainless steel type 316

The B54 profile measures 1.62 inches wide by .81 inches high, which is the half-height version of the standard 1-5/8 inch strut face. That 1.62 inch face is what matters for fittings and strut nuts, since standard 1-5/8 inch channel nuts and clamps ride in that slot. The .81 inch depth keeps the run tight to the wall or ceiling where a full 1-5/8 inch deep channel would stand too proud.

Yes, match the hardware. Putting plated steel nuts, bolts or clamps on a 316 stainless channel gives you dissimilar metals in the exact wet environment you bought the stainless for, and the plated part corrodes first. Order 316 stainless channel nuts, spring nuts, fittings and threaded rod so the whole assembly lasts as long as the strut. The fittings themselves are sized for the 1.62 inch channel face.

Order it as B54-240 SS6. In the B-Line numbering, B54 is the channel profile, 240 is the length in inches, and SS6 designates Type 316 stainless. That model code is what you give a distributor or put on a submittal.

It is steel, so it cuts and drills with normal tooling, but treat the 316 finish as the whole point of the part. Use stainless-dedicated blades and files so you do not embed carbon steel particles that rust later, and clean and passivate any cut, drilled or welded area. Stainless anti-seize on the threads is worth doing too, since 316 fasteners gall easily when run down dry.