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
Everbilt 1/2 in. x 5 in. MIP Brass Nipple Fitting 803129 - The Home Depot
Brass Pipe Fitting Assortment in Metal Durham Tray — Red Boar Chain & Fastener Questions Call 435-319-8344