Simpson HDIA37 Hollow Drop-In Internally Threaded expansion Anchor 3/8" Powers and commercial construction projects where

and commercial construction projects where metal-to-metal fastening is required

automatic digit inversion for overhead measurements

Toughened Steel Construction: Crafted from high-strength toughened steel designed to withstand the repetitive impact forces of concrete and masonry demolition

body made from 7-gauge steel

Simpson HDIA37 Hollow Drop-In Internally Threaded expansion Anchor 3/8" Powers and commercial construction projects whereThe 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