Specifically engineered to cap NPT fittings, Caplugs PN Series Push-On NPT Caps are red-tinted, easy-to-use caps that are versatile enough to be used on a variety of threaded or non-threaded fittings. These caps are equipped with a flanged top, allowing for easier gripping by hand and quick push-on installation and pull-off removal. The recessed gate provides additional protection for internal features of the caps. For your convenience, our PN Series caps are available in a number of different sizes to fit the more common NPT thread sizes. This particular model fits the following: Thread Size 1". These caps are fabricated from low-density polyethylene (LD-PE), a flexible and durable material that is resistant to water and a wide range of chemicals and weather types. It has a service temperature range of -94° F (-70° C) to 175° F (79° C). Caplugs prides itself on its extensive line of premium products that are suitable for a plethora of industries, from aviation to medical, general manufacturing and everything in-between. At Caplugs, we provide the broadest range of solutions and the highest quality parts right when you need them. Our teams work diligently to ensure consistent results, with more engineers on staff, processes for creative solutions and molding experts for reliable quality.