9 x 1 1/2 Simpson Metal-Panel Screw - Hex Drive 316 SS - Carton (1000) . • 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
