M18 M20 M22 M24 ED hollow hex flange plugs 304 stainless steel pipe Fittings set screw tube male bolt 1.5mm pitch Qty 1
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". :
Sigma ProConnex 1-1/4-in Die Cast Zinc Set Screw Coupling Conduit Fittings in the Conduit Fittings department at Lowes.com
High Quality Set Screw UL Listed Conduit Coupling Galvanized Steel Pipe Fitting - China EMT, Connector | Made-in-China.com
Steel Set Screw Connectors for EMT Conduit 1/2 Inch - China EMT Coupling, Steel Pipe | Made-in-China.com