Supply Giant 1" x 7", Steel Pipe, pre cut Industrial Pipe, Threaded Pipe Nipples and Fittings, Build Vintage DIY Furniture, Galvanized (Pack Of 4) - Walmart.com
Malleable Iron Fittings | GF | Galvanised
1/2" Galvanized Pipe Fittings – Pivot Parts USA
Amazon.com: Supply Giant GMCR0100-5 Galvanized Malleable Cross Fitting Four Way Threaded Pipe Connector, Connects to 1 Inch (Pack of 5) : Everything Else
Galvanized Pipe Fittings & Nipples - common and hard to find sizes
Galvanized Steel Pipe Fittings
Iron / Galvanized Fittings - Fittings - Ace Hardware