These specially designed solar fasteners can be used with most L-feet or SnapNrack Hanger Bolt Clamps to support rails on tile or metal roofing. The top is threaded and comes with a metric nut. The wood substructure fasteners have a 5/16" lag screw on the bottom. For metal substructures, the bottom has a similar metric threaded fitting and comes with an additional nut. Note that the warranty requires that metric drills be used for installation.
EJOT Solar Fastening System for Wood Substructures
EJOT Solar Fastening System for Metal Substructures