Self-Drilling Screw, #10 x 3 in, Zinc Plated Steel Flat Head Phillips Drive, 12 PK Ideal for any project involving light gauge sheet metal, awnings, door and window frames, gutters, sheds..
Especially useful in metal-to-metal or where heavy duty fastening is required. Machine screws are used in fastening nearly all types of hard materials.
A coupling nut is a long nut tapped from each side to meet in the middle, rather than all the way through in the same direction, used to connect two threaded rods end to end..