DeWALT Tapfast® Self-Tapping Screws–with Aluminum/EPDM Washer for Metal Applications, 100/Packs

TapFast fasteners are engineered for attaching light-gauge metal panels (up to 18 ga) to wood frame structures. Featuring a hex washer head paired with an aluminum EPDM bonded sealing washer for a reliable, weather-tight seal, TapFast delivers strong pull-out performance in wood while easily penetrating multiple panel thicknesses. The high-low thread design improves driving efficiency and holding power, and the Stalgard coating provides superior corrosion resistance versus standard zinc plating demonstrating no red rust after 1,000 hours in ASTM B117 testing. A Type 17 self-drilling wood point reduces splitting and speeds installation.

Key Features

• Aluminum EPDM bonded sealing washer for a weather-tight seal under metal panels
  
• High-low thread increases driving efficiency and pull-out performance in wood
  
• Easily penetrates multiple panel thicknesses for faster installs
  
• Stalgard coating for enhanced corrosion resistance vs. standard zinc (ASTM B117: ~1,000 hours, no red rust on significant surfaces)
  
• Hex washer head for positive drive and seating
  
• Type 17 wood-cutting point for quick starts and reduced splitting in wood substrates

Applications

• Metal roofing panels to wood
  
• Metal siding panels to wood
  

Available Head Styles

• Hex Washer Head with Aluminum EPDM Sealing Washer (this page)
  

Drill Point Types

• Type 17 (wood-cutting point)
  

Screw Sizes and Thread Options

• Diameter: #10
  
• Thread count: 16 TPI
  
• Length range: 1", 1-1/2", 2", 2-1/2", 3"
  
• Sealing washer diameter: 0.5" (aluminum EPDM bonded)
  
• Nominal head height: 0.295"

Product type: Metal-to-wood self-tapping screws for light-gauge metal panels (max 18 ga) to wood framing. 

Head / seal: Hex washer head with aluminum EPDM bonded sealing washer for a weather-tight seal (washer 0.5"). 

Threads / point: High-low thread, Type 17 wood-cutting point for fast starts and reduced splitting. 

Corrosion protection: Stalgard coating typically no red rust after 1,000 hrs ASTM B117; better than standard zinc. 

Typical application: Metal roofing & siding panels to wood. 

Nominal head height: 0.295" (all items below). (from your spec table)

Size-specific (dimensions, pack, and box weight)

• DFSEHH210 – #10-16 × 1" | Washer: 0.5" aluminum EPDM bonded | Point: Type 17 | Finish: Stalgard® | Full Case qty 3,000 pcs | Approx. box weight: 24 lb
• DFSEHH230 – #10-16 × 1-1/2" | Washer: 0.5" aluminum EPDM bonded | Point: Type 17 | Finish: Stalgard® | Full Case qty 2,500 pcs | Approx. box weight: 25–27 lb
• DFSEHH250 – #10-16 × 2" | Washer: 0.5" aluminum EPDM bonded | Point: Type 17 | Finish: Stalgard® | Full Case qty 1,500 pcs | Approx. box weight: 18 lb
• DFSEHH265 – #10-16 × 2-1/2" | Washer: 0.5" aluminum EPDM bonded | Point: Type 17 | Finish: Stalgard® | Full Case qty 1,000 pcs | Approx. box weight: 15 lb
• DFSEHH280 – #10-16 × 3" | Washer: 0.5" aluminum EPDM bonded | Point: Type 17 | Finish: Stalgard® | Full Case qty 800 pcs | Approx. box weight: 16 lb

Q: Why choose DEWALT Tapfast screws with aluminum/EPDM washer?
A: They provide a reliable weather seal for metal roofing and siding, combining strong fastening power with leak prevention thanks to the bonded aluminum and EPDM washer.

Q: What is the benefit of the EPDM washer?
A: EPDM rubber offers excellent UV and weather resistance, maintaining a tight seal for years and preventing leaks in exposed fastener installations.

Q: Do I need to pre-drill holes before using Tapfast screws?
A: No. Tapfast screws have a self-tapping point designed to penetrate metal panels and framing without pre-drilling in most applications.

Q: Where can I use these screws?
A: They are ideal for fastening metal roofing, siding, and cladding to steel framing or purlins in residential, commercial, and agricultural buildings.