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 They also center the rod

They also center the rod in the hole

Its U-shaped design and reinforced load-bearing structure help distribute weight efficiently

5/16"-diameter fixture hole is recommended

the #3 drill point penetrates steel without pre-drilling

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 They also center the rodWhen 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