Danco 1-1/2-in or 2-in PVC DWV Plug in the PVC DWV Pipe & Fittings department at Lowes.com
1-1/2" DWV PVC Fitting Cleanout Adapter and Plug D112-015
1pcs 1/2inch~2 Inch Male Thread Plug Pvc Pipe Standard Screw Plug Pipe Fittings Tube End Caps Plumbing Accessories Connector - Pipe Fittings - AliExpress
NIBCO 1-1/2 in. PVC DWV Spigot x FIPT Cleanout Adaptor with Plug C4816HD112 - The Home Depot
1-1/2" Schedule 80 PVC Plug 849-015
Charlotte Pipe 1-1/2 In. SPG x 1-1/2 In. FIP Schedule 40 DWV PVC Cleanout with Threaded Plug - Shelburne, VT - Rice Lumber
White Sch 40 1-1/2 Inch FNPT Female Pipe Thread Plastic Pipe Cap 1-1/2 inch PVC Female Threaded Pipe Cap PVC Threaded Plug for Home Sewer Plumbing Water Line - Amazon.com