After installation

1 1/8-12 x 4 1/2 Socket Cap Screw Alloy

17/64 Heavy Duty Jobber Drill Bit

9/16-18 x 3 1/2 Hex Cap Screw SS 316 (A4)

9 x 1 1/2 Simpson Metal-Panel Screw - Hex Drive 316 SS - Box (100) 1 1/4-7 Socket Cap Screws Alloy After installation9 x 1 1 2 Simpson Metal Panel Screw Hex Drive 316 SS Box (100) . Fasten aluminum agricultural siding panels to wood joists without pre drilling Extra sharp point for quick penetration of aluminum panels without point walking Twin lead thread fastens one to three panel thicknesses securely to wood substrate 5 16" Hex drive Panel screws available with and without aluminum neoprene bonded sealing washers