SteelTek 3/4-in Structural Galvanized Cross Tee in the Structural Pipe & Fittings department at Lowes.com
Amazon.com: Structural Pipe Fitting, 1-1/4" Adjustable Ell or Tee, 80A-7, Aluminum Magnesium, Please note. ID of fitting is 1.68, to take nominal 1-1/4" steel pipe which all have an OD of 1.66". :
Hardware Pipe Fittings Cast Iron Structural Pipe Fittings Tube Connector Key Clamp - China Key Clamps, Pipe Clamps | Made-in-China.com
Structural Pipe Fittings | U.S. Geological Survey
SteelTek 1-1/4-in Structural Galvanized Floor Flange in the Structural Pipe & Fittings department at Lowes.com
SteelTek 1-1/4-in 90-Degree Structural Galvanized Side Outlet Elbow in the Structural Pipe & Fittings department at Lowes.com
Tee, 1 1/2 in For Pipe Size, Structural Pipe Fitting - 4NXV5|4NXV5 - Grainger
Adj Tee, 2 in For Pipe Size, Structural Pipe Fitting - 54WJ81|17-9 - Grainger