Hillman Tap N' Seal self-piercing screw for fastening metal roofing and metal siding to wood framing in pole barns and similar metal-building applications. The needle point pierces metal and wood in one shot - no pilot hole needed - and the steel-backed flexible neoprene washer compresses to seal the fastened joint against wind-driven rain and snow melt.

• Size: #9 x 1" self-piercing pole barn / sheeter screw
• Head: Hex washer head with bonded steel-backed flexible neoprene washer
• Point: Needle point - cuts quickly through metal and wood with no pilot hole
• Thread: Coarse self-tapping thread for extra holding power in wood framing
• Finish: Gray ceramic-coated zinc plating - exceeds 1000-hour salt spray testing
• Fastens metal panels to wood and fiberglass panels to wood
• Pack: Contractor keg - 4,000 screws per keg

Tip: #9 x 1" is the short-reach pole barn screw for light-gauge corrugated panels into thin (1-by) purlin stock, panel-to-trim attachment at gable edges and ridge caps, and panel-overlap stitching where the fastener does not need to land in framing. Drive heads flush so the neoprene washer compresses evenly against the panel - over-drive and the washer extrudes out (no seal); under-drive and the washer doesn't load (still no seal). For maximum corrosion service, match the Hillman gray-ceramic Tap N' Seal screw with painted or galvalume-finished panels rather than bare galvanized - the gray ceramic finish is engineered to color-match common roofing finishes from a distance.