#10 x 1" self-drilling Woodbinder screw for fastening steel roofing and siding panels to wood framing or purlins. The Micro-Bit drill point cuts through panel metal without punching, and the fine-to-coarse thread transition pulls the head down for a flush, weathertight seat against a vulcanized EPDM-on-steel washer that seals reliably even when driven at an angle.

• Hex washer head, #10 gauge x 1" length, 1/4" drive socket
• Self-drilling Micro-Bit point eliminates need to pre-punch metal
• Fine-to-coarse thread transition for superior holding in pine, fir, and SPF framing
• UV-resistant EPDM rubber vulcanized to G-90 steel-backed sealing washer
• V-neck head design resists twist-off under driver torque
• 2.5 mil powder coat over zinc-plated and chromate-sealed carbon steel
• 250 screws per pack

Best for: attaching ribbed steel roofing or siding directly to 1x or 2x wood purlins where the 1" length lets the threads bite into nominal lumber without blowing through the back side.

Tip: Set your impact driver clutch (or drill speed) so the EPDM washer compresses just flush with the steel washer cup -- crushing the rubber past that point cuts seal life dramatically.