Z Fitting For 13 16" Channel Height 304 Stainless Steel Hangers and Electrical Fittings Self Drilling Point: Eliminates the need Self Drilling Point: Eliminates the need for pre drilling when fastening into steel framing moisture tolerant epoxy specially designed for pressure injection of concrete cracks and for increasing the bond between freshly placed repair mortars or concrete mixes and existing concrete when substrate temperatures are between 40°F (4°C) to 90°F (32°C) 304 Stainless Steel provides excellent corrosion resistance primarily for exterior use These connectors fit FS 500 or FS 520 Strut Channel Use Like Metal Hardware for your application so the material lasts up to its optimal timeline