7 x 2 1/4 Simpson Trim-Head Self-Drilling Siding Screw - Square Drive 410 SS - Carton (4000)

Threaded 2/3 of overall length

9/16-18 x 5 Hex Cap Screw SS 18-8 (A2)

9/16-12 x 5 1/2 Socket Cap Screw Alloy

9 x 1 1/2 Simpson Metal-Panel Screw - Hex Drive 316 SS - Carton (1000) 5/8-11 Hex Cap Screws 316 Stainless Steel 7 x 2 1/4 Simpson9 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