8481.90.90.40 - Other

This HTS subcategory, 8481.90.90.40, encompasses "Other" parts specifically designed for valves classified under subheading 8481.20. Subheading 8481.20 covers "Oil or other liquid hydraulic or pneumatic power transmission valves." Therefore, this category includes components of such valves that are not elsewhere specified within Chapter 84, particularly those parts not falling under the specific "valve bodies" classification (8481.90.90.20) at the same level.

The distinction between this category and its sibling, 8481.90.90.20, is crucial. While 8481.90.90.20 exclusively covers the main casing or shell of the valve (the "body"), this subcategory of "Other" parts includes all remaining components of hydraulic or pneumatic transmission valves. Examples of items that would fall here include diaphragms, seals, O-rings, springs, stems, plungers, and any other internal or external fitting not considered the primary valve body, provided they are integral to the function of a valve used for hydraulic or pneumatic power transmission.