Hollaender - 3/4″ Pipe, 90° Three Socket Tee, Aluminum Alloy Tee Pipe Rail Fitting - 04206611 - MSC Industrial Supply
Industrial Hardware 134160 British Standard Medium-Pressure Aluminum Pipe Fitting 90 Degree Elbow Connector 3/4 BSPT Female
Amazon.com: Structural Pipe Fitting, 3/4" Offset Cross, 22X-5, Aluminum Magnesium, Please note. ID of fitting is 1.07", to take nominal 3/4" steel pipe which all have an OD of 1.05". : Industrial
Pipe Fitting - Aluminum - Class 150 - 180 Degree Return Bend - 3/4" NPT Female