The Multithreaded World Of Container Finishes

I would love to spend my day witnessing the miracle of learning, watching as finish wisdom induced joy sweeps across the faces of readers everywhere, but I can't. These brainy, packaging savvy blog posts don't write themselves, so let's move on. In the finish section of the aforementioned article I said, "Finishes come in different styles and sizes". The article continues with a description of finish size, but not much mention of closure track style. Now, my intent was not to deprive you of vital information but to merely save the topic for concentrated discussion at another date. Have no fear, the time to review finish styles has come.

Continuous Thread
Continuous thread style can be recognized on metal lids. This finish type has a twistable track that requires a full turn and a half to completely seal a container. Closures with this finish are often ribbed to assist gripping when swiveled. Continuous thread metal lids are well suited to contain chemical and food products.

Lug or Twist Cap
Lug or twist cap finishes are also found on metal closures. This cap boasts a broken threading, contrasting from continuous thread lids, lug or twist caps can fully seal in a quarter turn. Caps with this finish style are commonly used in canning products like jams and sauces.

Metal Slip cover or Friction Fit Lids
Metal slip covers also known as friction fit lids are typically used on tins. This type of closure finish is created to fit over, closing a product. The container stays shut with the assistance of friction created between the container and the lid. This lid is useful for particular products, but does not insure an air-tight or spill proof seal.

Snap on Tub lids
Snap on lids have a special finish detailed with an intricate system of grooves and skirt indentions that enable the lid to be sealed through a pressure induced snap, rather than a twist along threads. This type of closure paired with a tub allows for an airtight and spill-proof seal. You can find this type of lid on butter, ice cream and other dairy products.

Triple Thread
Triple thread finishes are distinguished by three threads or start points along the finish. This type of track allows closures to be applied to a container with less effort than is needed to screw on a continuous thread option and often enables greater sealing power. Many deep skirt lids are triple thread closures, the multiple thread form is conducive to a taller finish area, giving the closure plenty of room to be twisted and installed low on the container.

With the knowledge of different finish styles you now have the insight required to choose which type of closure is most suitable for your product. Whether your container has a steady continuous thread personality, an alternating lug character, a magnetizing friction fit temperament, a snappy lid attitude or a triple threaded identity you can find all you need right here. Take a look through our variously characterized closure options and start building your newest product today.

By: Kayla Holman

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Perplexed by container finishes? Read Kayla Holman's explanatory article on container thread styles for helpful packaging insight.