The P1272S Unistrut Beam Clamp is used to connect a section of Unistrut Channel to an I-Beam or other structural beam. One 3/8" set screw is included. Requires one 3/8" x 1-1/2" hex head cap screw. The beam clamp can be used up to 3/4" flange thickness. It's available in either Perma-Green or Electrogalvanized finishes.