threaded NPT Series Threaded Plug for NPT Fitting NPT Series threaded plugs are designed to be used as dust plugs to keep out contaminants and moisture, and to protect against thread damage during shipping and storage. * Easy to install and remove * Fully threaded to ensure a secure fit * Locks tight to keep out moisture and debris * Lightweight and durable Material: High-Density Polyethylene Colors: White Optional Colors: Red PD Series Threaded Plastic Plugs for Flared JIC Fittings PD Series are designed for use on flared JIC fittings and will seal low-pressure requirements with light finger tightening. May be used on 37° flared fittings without gaskets. The plugs are knurled for easy installation and removal 4, 6 OR 8 RIBS Equally Spaced Material: High-Density Polyethylene/Low-Density Polyethylene Color: Red Applicable Specs: NAS 833, NAS 815 C D B 126 * For other material and color options, contact customer service.