Simpson HDIA31 5/16" Hollow Drop-In Anchor - Zamac 3, Pkg 50 ABA/ABU/ABW Adjustable Post Bases Installing metal roofing

Installing metal roofing

SSTB anchor bolts deliver the dependable performance needed for critical structural connections

Designed for structural and general framing applications

Manufactured from durable steel and available in multiple size options

Quik Guard® Coating – Provides strong corrosion resistance for long-term durability in outdoor builds

Simpson HDIA31 5/16" Hollow Drop-In Anchor - Zamac 3, Pkg 50 ABA/ABU/ABW Adjustable Post Bases Installing metal roofingThe Simpson Strong Tie Hollow Drop In Anchor (HDIA) is an internally threaded, flush mount expansion anchor for use in hollow materials such as CMU and hollow core plank, as well as in solid base materials such as brick, normal weight and lightweight concrete. The expansion design allows anchoring to CMU, hollow core plank, brick, normal weight concrete and lightweight concrete while the internally threaded anchor allows for easy bolt removal.