Amazon.com: Structural Pipe Fitting, DIY Outdoor, Use Imagination -1-1/2"Tee-E Short, 3T-8, Aluminum Magnesium, Note: ID of fitting is 1.925, to take nominal 1-1/2" steel pipe which all have an OD of 1.9". :
Steel Set Screw Connectors for EMT Conduit 1/2 Inch - China EMT Coupling, Steel Pipe | Made-in-China.com
Kee Klamp Type 100 Steel Pipe Fittings - Set Screw Caps | Hoover Fence Co.
4" SET SCREW PIPE FITTING | eBay
Steel EMT Conduit And Fittings Set Screw Coupling 1/2” Conduit Pipe Fittings
Halex 1/2 in. Electrical Metallic Tube (EMT) Set-Screw Connectors (5-Pack) 26270 - The Home Depot
ZINC DIE-CAST EMT INSIDE CORNER ELBOWS SET-SCREW TYPE