B-Line B234LSS4 Eaton series strut fittings and accessories, 4.2" Height, 3.5" Length, 1.62" Width, 1lbs, Steel, Left hand four hole gussetted corner angle, 90 deg, Stainless steel type 304

The B234LSS4 is the left hand version of the four hole gussetted 90 degree corner angle. Handing matters on a gussetted fitting because the gusset sits on one side of the corner, so a left hand part mirrors a right hand one. If the gusset needs to fall on the opposite face of your strut joint, you need the right hand equivalent instead.

Material is listed as steel with a stainless steel type 304 finish designation. Type 304 is the common austenitic stainless grade used where a carbon steel or electro-galvanized fitting would corrode, so it suits damp interiors, washdown areas and sheltered exterior runs.

The B234LSS4 is supplied as the fitting only. Four bolts and four channel nuts or spring nuts are needed to land the four holes, and for a 304 stainless fitting you should order stainless hardware to match so you do not set up galvanic or rust problems at the connection.

It ties two runs of strut channel together at 90 degrees, and the gusset (the triangular web across the corner) stiffens the joint so the angle resists deflection under load far better than a plain flat 90 degree bracket. Electricians and mechanical contractors use them for trapeze supports, conduit racks and equipment frames where the corner carries real weight. If the joint is only locating something light, a plain angle is the simpler choice.

Order by manufacturer part number B234LSS4 from Eaton B-Line. The SS4 suffix identifies the type 304 stainless version and the L identifies left hand, so a quote written against B234 alone can come back as plain steel or as the opposite hand.