B-Line Eaton series strut fittings and accessories, 1.62" Height, 1.62" Length, 1.62" Width, .18lbs, Steel, Square washer, Hole size 3/8 in diameter |

The B200HDG square washer is drilled 3/8 inch and is sized for 5/16 inch bolt or threaded rod. The 3/8 inch hole gives a little clearance around a 5/16 inch fastener, so it drops on without fighting the threads. If you are running 3/8 inch rod, this is not the washer for it.

It is hot-dipped galvanized steel, which is the finish normally specified for outdoor, rooftop, parking structure and wash-down areas. For dry interior strut runs a plain or electro-galvanized washer would do, but the hot-dip coating is what you want where the assembly sees weather.

It measures 1.62 x 1.62 x 1.62 inches per the published height, length and width, and weighs .18 lb. That footprint is wider than the open throat of standard 1-5/8 inch strut, so the washer bears on the channel lips rather than dropping through, which is the point of a square strut washer over a round flat washer.

A square washer spreads the bolt load across the two inturned lips of the channel instead of concentrating it at the edge of a round washer. On a 1.62 inch square body with a 3/8 inch hole, the bearing surface sits over both lips, which keeps the lips from deforming when you torque a 5/16 inch bolt down. Use it wherever you are bolting through the open face of strut rather than through a drilled hole in the back.

No. The B200HDG is the square washer only. You order the 5/16 inch bolt or threaded rod and the matching strut channel nut separately to complete the connection.

No, it is carbon steel with a hot-dipped galvanized coating. In chemically aggressive or coastal splash-zone work where a specification calls for stainless strut hardware, this is not a substitute; the galvanized version is for general indoor and outdoor construction use.