B-Line B134RSS4 Eaton series strut fittings and accessories, 3.5" Height, 3.93" Length, 1.87" Width, 1.00lbs, Steel, Four hole gussetted corner angle, 90 deg | Right hand, Thickness 1/4 in, Stainless steel type 304

The B134RSS4 is the right hand version of the four hole gussetted 90 degree corner angle. Handing matters on a gusseted angle: the gusset sits on one side of the corner, so a right hand fitting mirrors the left hand one. If your bracket needs the gusset on the opposite face, order the left hand part instead.

It is Type 304 stainless steel, not a plated or painted carbon steel fitting. That is what makes it usable in wash-down areas, food and beverage plants, coastal exteriors and other wet or corrosive locations where a zinc plated angle would rust out. The base material is listed as steel with a Type 304 stainless finish designation.

Use a gusseted angle like the B134RSS4 where the corner carries real load or has to stay square, such as a cantilevered support or a freestanding strut frame. The gusset triangulates the corner so the bracket resists bending at the joint. A plain flat 90 degree angle is fine for light trapeze work, conduit runs and alignment joints where the strut itself carries the load. The trade-off with a gusseted fitting is bulk: at 1.87 inches wide it occupies more space around the corner than a flat angle.

The angle is a bracket only, with four bolt holes. You supply the channel nuts, bolts and washers to attach it to your strut. Since the fitting is Type 304 stainless, match the hardware in stainless as well, mixing in zinc plated bolts on a stainless fitting reintroduces the corrosion point you paid to avoid.

Order Eaton B-Line part number B134RSS4. The RSS4 suffix identifies the right hand, Type 304 stainless version of the B134 four hole gusseted 90 degree corner angle. A quote or submittal listing a different suffix is a different handing or a different material, so confirm the full designation before releasing the order.

Two, one right hand and one left hand. The B134RSS4 is right hand only, so a corner braced symmetrically on both faces of the strut needs a matching left hand piece ordered alongside it. Each angle weighs 1 lb, which is worth noting when you are pricing out a frame with dozens of corners.