The 1/2 in. Channel Spring Nuts (5-Pack) are self-aligning nuts that provide resistance to pull out and side slip beyond the normal strength of the channels. The spring nuts feature alternate teeth, spaced and designed for a wedging action, that increase with pressure or load to reduce side slip. They fit all 1-1/2 in. and 1-5/8 in. channel strut. Color: Silver Electroplated Finish.