Hilti HKD 3/8" NC Anchors (Box of 50)

This is a box of Hilti HKD 3/8" NC flush drop-in anchors used for heavy-duty fastening into concrete. ​Here are the key details from the packaging: ​Product Name: Hilti HKD 3/8" NC (National Coarse thread). ​Quantity: Originally contained 50 anchors. ​Required Drill Bit Size: Requires a 15/32" (12 mm) diameter drill bit to pre-drill the installation hole. ​Anchor Type: These are metallic drop-in expansion anchors, typically installed using a setting tool that expands the internal plug against the walls of the concrete hole.