Back Home / Pipe & Tube Fittings / Plastic Caps & Plugs / PLASTIC CAP/PLUG CAP 1/4″ PIPE, PLUG 3/8″ TUBE PLASTIC CAP/PLUG CAP 1/4″ PIPE, PLUG 3/8″ TUBE SKU: T6 Categories: Pipe & Tube Fittings, Plastic Caps & Plugs Caplugs T series. Tapered in design and made from highly pliable polyethylene. Not only can they be applied to fit snugly, but can be easily removed. Recommended for use with tube and hydraulic fittings and for threaded external and internal pipe fittings. Depending on application, can be used many times as a plug or a cap. Red in color. Can be used as a cap for 1/4″ male pipe thread. Can be used as a plug for 3/8″ o.d. tubing. Case Quantity: 50 Log In For Pricing