Winches permanently mounted on and designed for a specific vehicle type may be classified as parts or accessories of that vehicle rather than under the standalone winch heading. The key factors are whether the winch is sold and imported as part of the vehicle assembly and whether it is purpose-designed for that vehicle, versus being a general-purpose winch that happens to be vehicle-mountable.

A capstan is a rotating vertical drum used to haul rope or cable by friction, typically in mooring and rigging applications, and does not store the line on the drum. A winch, by contrast, spools the line onto a drum as it is retrieved. Both are covered by 74425, but the distinction matters for technical documentation and for matching the article to the correct product description at entry.