Simpson HDIA37 Hollow Drop-In Internally Threaded expansion Anchor 3/8" Metalworking including concrete masonry unit (CMU)

including concrete masonry unit (CMU) and brick

Consistent performance in high and low strength concrete

Featuring the new

Radius Sides & Chamfered Edges: Streamline alignment and speed up installation without sacrificing precision

What fasteners are required to install the HD3BHDG holdown

Simpson HDIA37 Hollow Drop-In Internally Threaded expansion Anchor 3/8" Metalworking including concrete masonry unit (CMU)The Simpson Strong Tie HDIA37 HDIA Hollow Drop In Internally Threaded Anchor is an internally threaded, flush mount expansion anchor engineered for attaching threaded rod to support conduit, cables, and lighting. Designed for versatility across both hollow and solid base materials, this anchor delivers reliable holding power in CMU, hollow core plank, brick, normal weight concrete, and lightweight concrete all with the convenience of a flush mount