Sigma ProConnex 1/2-in Electrical (EMT) Zinc-plated Steel Set Screw Connector Conduit Fittings (5-Pack) in the Conduit Fittings department at Lowes.com
Types of Pipe Fittings - The Home Depot
Black Pipe Fittings - 1" Lateral Wye, 150# UL/FM
Kee Klamp Type 100 Steel Pipe Fittings - Set Screw Caps | Hoover Fence Co.
Amazon.com: Supply Giant GMCR0100-5 Galvanized Malleable Cross Fitting Four Way Threaded Pipe Connector, Connects to 1 Inch (Pack of 5) : Everything Else
Screwed/threaded Fittings
Sanitary Female Threaded | Pipe Fitting | to TRI CLAMP
4PCS Hex Nipple 1/2" Male x 1/2" Male Pipe Fittings, 304 Stainless Steel 1/2 inch NPT Male Threaded Pipe Adapter Fittings Equal Nipples Connectors, Male Straight Connector Pipe Fitting - Amazon.com
TTF SS Threaded Pipe Fittings, Material Grade: SS316L