Multi-substrate fastener

A method for securing a plate to a layered substrate, the method comprising:

• positioning the plate on the layered substrate that includes at least a first layer and a second layer, wherein the plate is positioned adjacent to the second layer so that the second layer is between the first layer and the plate;
• aligning a threaded fastener with an aperture in the plate, the threaded fastener including a shank having a first thread and a second thread;
• and
• installing the threaded fastener through the aperture and into the layered substrate such that a first portion of the shank corresponding to the first thread extends into the first layer and a second portion of the shank corresponding to the second thread extends into the second layer.

A threaded fastener for securing a plate to a substrate, the threaded fastener comprising:

• a head;
• a shank having a longitudinal axis between a first end and a second end, wherein the shank is connected to the head at the second end, the shank comprising:
• a pointed terminus at the first end, and
• a thread that encircles the shank along the longitudinal axis;
• and
• a part line along the longitudinal axis of the shank, wherein the part line corresponds to a casting method used to form the threaded fastener.