The Plumber's Choice 3/8 in. L Black Malleable Iron Pipe Cap, Threaded Fitting 150 lbs. Application (10-Pack) 0038BMCP-10 - The Home Depot
ASME B16.11 Threaded Pipe Cap, End Cap Manufacturer
Uxcell G1/2 Male Threaded PVC Hex Head End Cap Pipe Plug Fitting Blue 6 Pack - Walmart.com
Buy Threaded Cap online at Access Truck Parts
PVC Threaded Cap - DripWorks
BSPT Female Thread 304 Stainless Steel Pipe Fitting Hex Head Socket Plug End Cap - Threaded Cap for Plumbing, Shower Head Pipes, Gas Line Termination & Water Stopper (Specification: 1-1/4") - Amazon.com
BrassCraft 1/2-in Threaded Cap Fitting, Removable, Female, Brass, Gold, Complies with Federal Lead Guidelines in the Brass Fittings department at Lowes.com