Caps and covers

What is Freight Class?

Freight class is a standard classification system for shipments, defined by the National Motor Freight Traffic Association (NMFTA). It's used to categorize commodities like Caps and covers for transport, taking into account factors like weight, dimensions, density, storage capability, ease of handling, and liability. Freight class is a system to categorize different types of goods being shipped.

How to determine Freight Class

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Density is a key concept in freight shipping, as it significantly impacts the freight class for commodities like Caps and covers and hence, the shipping cost. It is calculated as the weight of the shipment divided by its volume. It's a measure used in shipping to determine how much space a certain weight of goods will occupy.

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Stowability is used in freight shipping to describe how easily an item can be stowed or stored in relation to other items. For example, when trying to understand stowability for Caps and covers, it is important to know if the item can be packaged efficiently and stowed onto the truck easily. In other words- Stowability is an assessment of how well a shipment can be stowed for transport.

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Liability is a term used to refer to the accountability or risk involved in transporting Caps and covers. It's one of the factors considered when determining freight class. Liability is the potential cost a carrier could incur due to damaged or lost freight.

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Handling refers to the procedures and precautions taken when moving and storing Caps and covers. It is one of the factors considered when determining freight class for Caps and covers. Handling is the process of moving and storing goods during shipping.

Freight Class Commodities


Bottle Caps And Cover

Caps And Cover Ends

Caps And Cover Tops




Separate or combined with aluminum, crimped edge. Applies only on caps of the type used for bottled beverages, having crimps, corrugations or flutings around the perimeter of cap. Provisions will not apply on screw-thread, twist-on or lug held caps. Lined with cork, paperboard or plastic, without attachments, in boxes or drums

NOI, other than plastic, with or without fasteners, for bottles, cans, cups, collapsible tubes, glasses, jars or jugs, in packages

Common Commodity Items



For many NMFC® codes there isn’t just one single class that is applied. Often, NMFC® numbers have multiple "sub-classes", which are almost always based on the density of the shipment. In the instance where your NMFC® number has multiple sub classes, it's best to contact an expert, like Koho, to help identify which subclass to use.


Where can I find a freight code list?

The National Motor Freight Traffic Association (NMFTA) publishes a list of freight class designations, codes, and subclasses for commonly shipped items ( A subscription is required to view this list. You can read more about freight classes at Koho for free on our freight classes pages.

How many freight classes are there?

The National Motor Freight and Traffic Association has 18 freight classes numbered 50 to 500. The lower the freight class, the lower the cost of transporting that freight.