One of the strongest methods of connecting T-slot Aluminum Extrusions in a 90 degree join is bolting through the ends. These 30mm long M6 bolts will offer plenty of thread depth for numerous types of connection including end-bolting. The head features a profile that fits standard 20 Series T-Slot Extrusions. The small Hex / Allen head allows these to be tightened through a relatively small borehole on the opposite side of the T-Slot.