Parts for Mechanical Spraying, Blasting & Fire Extinguisher Appliances

When a part is designed for use with a specific type of machine (e.g., fire extinguishers or sand blasting machines), it should be classified under the dedicated parts line for that machine — 8424900500 or 8424902000, respectively. Truly interchangeable parts with no principal-use association fall under the residual lines such as 8424909080 or 8424909500. Supplier documentation identifying the intended parent machine is the most reliable basis for classification.

Nozzles and spray tips designed specifically for use with spray guns or other appliances under heading 8424 are generally classified as parts under 8424.90 rather than as separate articles. However, nozzles with a broader industrial application — such as fluid-handling nozzles used across multiple equipment types — may be classified elsewhere in Chapter 84 or in Chapter 73 (iron or steel fittings). The principal-use test and the article's design specificity are the determining factors.