NMFC
NMFC stands for National Motor Freight Classification, the standardized commodity coding system maintained by the National Motor Freight Traffic Association that LTL carriers use to assign freight class. Each commodity has a unique six-digit NMFC number that maps to one of 18 freight classes (50 to 500) based on density, stowability, handling, and liability. For example, NMFC 156600 covers most "machinery, not otherwise indexed" at class 85, while NMFC 124110 covers ceiling fans at class 250.
Why it matters
The NMFC code on your bill of lading determines your freight class, which determines your LTL rate. A wrong NMFC selection can shift a shipment from class 70 to class 175, tripling the line haul cost and triggering a $50 to $200 reclassification penalty after the carrier reweighs at the terminal. NMFC misclassification is one of the top three sources of LTL invoice disputes industry-wide.
When to use it
Look up the correct NMFC code any time you ship LTL with a traditional carrier. The full NMFC database is paywalled at nmfta.org, but most shippers use a freight class calculator that maps commodity descriptions to likely NMFC numbers. Maintain an internal NMFC reference for your top 25 SKUs so warehouse staff can populate the BOL accurately at pickup time.
How Warp thinks about it
Warp prices LTL by the pallet (count, weight, dimensions), not by NMFC code. There is no NMFC lookup, no class assignment, and no reclassification risk. Per-pallet pricing means the rate you book is the rate you pay, regardless of commodity type.
Frequently asked questions about nmfc
What is nmfc?
NMFC stands for National Motor Freight Classification, the standardized commodity coding system maintained by the National Motor Freight Traffic Association that LTL carriers use to assign freight class. Each commodity has a unique six-digit NMFC number that maps to one of 18 freight classes (50 to 500) based on density, stowability, handling, and liability. For example, NMFC 156600 covers most "machinery, not otherwise indexed" at class 85, while NMFC 124110 covers ceiling fans at class 250.
Why does nmfc matter in freight?
The NMFC code on your bill of lading determines your freight class, which determines your LTL rate. A wrong NMFC selection can shift a shipment from class 70 to class 175, tripling the line haul cost and triggering a $50 to $200 reclassification penalty after the carrier reweighs at the terminal. NMFC misclassification is one of the top three sources of LTL invoice disputes industry-wide.
When should you use nmfc?
Look up the correct NMFC code any time you ship LTL with a traditional carrier. The full NMFC database is paywalled at nmfta.org, but most shippers use a freight class calculator that maps commodity descriptions to likely NMFC numbers. Maintain an internal NMFC reference for your top 25 SKUs so warehouse staff can populate the BOL accurately at pickup time.
How does Warp handle nmfc?
Warp prices LTL by the pallet (count, weight, dimensions), not by NMFC code. There is no NMFC lookup, no class assignment, and no reclassification risk. Per-pallet pricing means the rate you book is the rate you pay, regardless of commodity type.