Simpson Strong-Tie DIA Drop-In Internally Threaded Anchor for 1/2-in. Rod (20-Pack) DIA50C20 - The Home Depot
5pcs Inner M4 Connecting Hollow Straight Pipe Diameter 4.8mm M4 Internal Thread Connecting Rod With Internal Thread - AliExpress
DEWALT PFM2211250 1/4" x 2-1/2" HangerMate+ Rod Hanging Anchors for Concrete - PFM2211250 | Tanner
din 975 internally gi threaded rod| Alibaba.com
Stainless Steel Threaded Rod | SS 304 / 316 Thread Bar Manufacturer
Aluminum, Plain, Internally Threaded Rod - 2DLR9|LINKT136 - Grainger
Buy Wholesale China Galvanized Iron Stainless Steel Internally Threaded Aluminum Hollow Thread Rod & Stainless Hollow Internally Threaded Rod at USD 0.05 | Global Sources