Thread Rolling Machines for Metal Working

The HS nomenclature gives thread rolling its own subheading (846320) because the process — forming threads by plastic deformation rather than cutting — is distinct from both general pressing and material-removal operations. This specificity matters for classification: a machine that cuts threads (e.g., a thread-cutting lathe) falls under a different heading entirely, while a machine that rolls threads belongs here regardless of whether it also performs other forming operations.

For used equipment, CBP expects the commercial invoice to reflect fair market value rather than original cost. Supporting documents such as an independent appraisal, a dealer's market quotation for comparable used machines, or the seller's depreciation schedule help substantiate the declared value and reduce the risk of a CBP value inquiry or reappraisement.