316L Stainless Steel, 3/8 in Fitting Pipe Size, Round Cap - 2TV60|60RDC111N038 - Grainger
IMPERIAL 8-in Black Steel Stove Pipe Cap in the Stove Pipe Fittings department at Lowes.com
3/8 Inch Pipe Cap PT3/8 Female Pipe Fitting 304 Stainless Steel Round Compression Stop Valve Connector - Walmart.com
Supply Giant 3942 Flexible PVC Pipe Cap with Stainless Steel Clamps, 2" Inner and 2-3/8", Black - Amazon.com
Pipe Fittings Direct. 8 inch schedule 40 SA-234 carbon steel weld on caps
Amazon.com : Flat Caps for 2-3/8" Pipe : Sign And Poster Kits : Office Products
Charlotte Pipe 8 in. PVC Schedule 40 Socket Cap PVC 02116 2400 - The Home Depot
Amazon.com: Vent Systems 8" Metal Tee Cap. Galvanized Steel End Cap. Dryer Duct End Cap. 8In Steel End Cap. Steel Plug 8Inch. Round Metal Duct Fitting. Reusable. 200mm : Tools & Home
uxcell 304 Stainless Steel Pipe End Cap Fitting 3/8 NPT Female Thread Plug - Amazon.com
Pipe caps: domed steel weld on 2 7/8” outside diameter (Pipe Caps of Texas) | eBay
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
STZ 3/8 in. Black Iron Cap 310 CA-38 - The Home Depot