Hillman 370984 Wedge Anchor, 3/8 X 3-Inch, 25-Pack;

The Power-Stud+ SD1 is a fully threaded, torque controlled, wedge expansion anchor that is designed for concrete applications. Suitable base materials are normal-weight and sand-lightweight concrete, concrete over steel deck, and grouted concrete masonry. This anchor has various DOT approvals including Caltrans listing for "Stud Mechanical Expansion Anchors". Building code approved.