Features. Hot Dipped Galvanized Steel Flat Head. Pack of 6. Specifications: Color: Gray. Hot Dipped Galvanized Finish. Gauge 7. Head Diameter: 0.375 in. Head Type: Flat. Length: 4 in. Material: Steel. Barn Post Nail Type: Point Type: Blunt. Shank Type: Ring Shank. Ring Size: 20D. Pack Size: 5. Indoor or Outdoor. Weight: 31.62 lbs