8412.31.00.40 - Tie-rod type

This HTS classification, 8412.31.00.40, specifically covers pneumatic power cylinders of the "tie-rod type." These are mechanical devices that convert compressed air energy into linear mechanical motion. The defining characteristic of tie-rod cylinders is their construction, which utilizes threaded tie rods to hold the cylinder body together, providing robust structural integrity and allowing for operation under significant pressure and stress.

This category is distinguished from its sibling, 8412.31.00.80, which encompasses "other" linear acting pneumatic power cylinders. While both fall under the broader umbrella of pneumatic cylinders, the "tie-rod type" designation mandates a specific construction method involving tie rods for assembly. Other types of pneumatic cylinders might be constructed using different methods, such as flanged or welded designs, and would therefore be classified under the "other" subheading.

As this is a leaf node in the HTS classification, there are no further subcategories. Classification at this level is determined by the specific design feature of the tie-rod construction. Therefore, importers and exporters must carefully examine the physical characteristics of the pneumatic cylinder to ensure it meets the criteria for tie-rod type construction to accurately assign this HTS code.