Anatomy of a Bottle: Neck Finish

Anatomy of a Bottle: Neck Finish
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Anatomy of a Bottle: Neck Finish Anatomy of a Bottle: Neck Finish

Part 2 in our Anatomy of a Bottle Series is focused on neck finish: the part of the container that secures the closure. A container and its corresponding cap must have matching finishes. For example, a 20-400 bottle will only accept a 20-400 closure.

Take a look at the image below to match the definitions with the terms.  

S - Thread Start

The distance from the top of the finish to the top of the thread start

L - Bead Locating Dimension

The distance from the top of the finish to the top of the bead

H - Finish height

The distance from the top of the finish to the intersection of the projected "T" diameter and the shoulder slope

T - Thread Diameter 

Major diameter - outside measurement across threads

E - Exterior Diameter 

Minor diameter - measurement across the threads

W - Bead Width

Width of the neck bead

I - Inside Diameter

Inner diameter of the bottle neck

Remember, if you are ever having trouble solving the mysteries of the packaging industry, like getting a better understanding about the finish to the neck of a bottle, give us a call and let us help. Our Packaging Consultants have years of experience finding perfect solutions for customers from all industries.


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