LTWFITTING 1/2 in. x 3 in. Brass MIP Nipple Fitting (5-Pack) HF10684805 - The Home Depot
1/8 IP x 3/16", Both Ends Threaded, Fixture Stem - Lamp Pipe, Your Choice of Lengths from 1-1/2" to 36" (1/8 IP = 3/8" diameter) (22249BU) - Antique Lamp Supply - Quality Lamp Parts Since 1952
K & S 9217 Round Brass Tube, 1/2" OD x 0.029" Wall x 36" Long, 4 Pieces, Made in The USA: Metal Industrial Wall Tubing: Amazon.com: Industrial & Scientific
Everbilt 1/2 in. x 5 in. MIP Brass Nipple Fitting 803129 - The Home Depot
Red Brass, 1/2 in Nominal Pipe Size, Nipple - 4GRX8|463-065GR - Grainger
Hex Nipple, Brass | 122 x 1/4
1" Brass Pipe Coupling - Warren Pipe and Supply
Hooshing Brass Pipe Fitting, 1/2" Female to 1/2" Male Brass Pipe Nipple Extension Connector Fitting Straight Thread Hex Bushing Adapter Converter Adapter, Length 3.94 Inch/100 mm - Amazon.com