28-400 Black Phenolic with Cone Continuous Thread Closure

A thread that spirals downward uninterrupted against the interior walls of a cap and a natural colored cone in the middle are the distinct features of a phenolic cone closure. Phenolic caps are a type of continuous thread cap, but is an upgrade due to the built-in cone providing a better seal between the cap and container especially for oil-based products. Phenolic closures are also made to be more durable against aggressive materials such as oils and other chemicals which makes them a popular closure choice for essential oils, personal care, aerospace, and chemical industries.