Simpson HDU4-SDS2.5 10-15/16" Predeflected Holdown w/Screws Painted Wood Deck Screws self-undercutting threads eliminate the need

self-undercutting threads eliminate the need for inserts or special tools

Flexible design: #9 Roofjack size fits pipe sizes from 9" – 20”

Chamfered End: Smooth entry for easy installation and minimal thread damage

The #3 Square Silicone Metal Roof Pipe Boot with Install Kit is a complete solution for sealing pipe penetrations on metal roofs

offering the strength needed for demanding structural projects such as decks

Simpson HDU4-SDS2.5 10-15/16" Predeflected Holdown w/Screws Painted Wood Deck Screws self-undercutting threads eliminate the needSimpson Strong Tie HDU Holdowns are pre deflected to virtually eliminate deflection under load due to material stretch. The Strong Tie HDU4 SDS2. 5 pre deflected holdown is installed with Simpson Strong Drive SDS heavy duty connector screws which are included with the holdown. Need more corrosion resistance? See the Hot Dip Galvanized HDU4. HDU Special Features Holdown designs virtually eliminate deflection due to material strech. Uses Strong Drive