Simpson Strong-Tie #8 x 1-5/8" Self-Drilling Wood-to-Steel Screw, Square Bugle Head - 410 Stainless Steel, Qty. 1,000 HUC/HUCQ Concealed Face Mount Hangers drive the hanger until it

drive the hanger until it contacts the steel surface

this post base allows you to drive the spike directly into the ground

They're also fully removable

They also center the rod in the hole

Follow Simpson Strong-Tie load tables for required nail type

Simpson Strong-Tie #8 x 1-5/8" Self-Drilling Wood-to-Steel Screw, Square Bugle Head - 410 Stainless Steel, Qty. 1,000 HUC/HUCQ Concealed Face Mount Hangers drive the hanger until itWhen you need a clean, flush fitting fastener for panel to steel applications, the Simpson Strong Tie F08T162BDM Self Drilling Bugle Head Screw delivers reliable performance. Its bugle head seats flush with wood or OSB panels, the #3 drill point penetrates steel without pre drilling, and the Type 410 stainless steel construction with corrosion resistant coating ensures durability in demanding framing tasks. Ideal for securing wood, plywood or OSB to