Maximum: 3

even in pressure treated wood

1/8 x 3 Powers Combo Mushroom Toggle Bolt Zinc Plated (50)

Toggle bolts

8 x 9/16 Simpson Mod Truss-Head Self-Drilling Wire Lath Screws - Phillips Drive 410 SS - Box (100) 10-24 Socket Cap Screws Alloy Maximum: 38 x 9 16 Simpson Mod Truss Head Self Drilling Wire Lath Screws Phillips Drive 410 SS Box (100) . Fastens corrugated siding panels to steel stud without pre drilling #3 drill point for quick penetration of aluminum panels without "point walking" Securely fastens one to three panel thicknesses #8 Diameter #2 Phillips drive Drilling thickness capacity: up to 0. 142" (118 mils or 10 ga.)