HTSUS Chapter 73 on the customs broker exam

Chapter 73 of the Harmonized Tariff Schedule covers Articles of iron or steel. Across the released customs broker exams, 7 questions turn on classifying goods in this chapter. Drawn from 6 released sittings, April 2021 through October 2025. Below: every heading CBP has tested, the official heading text, and each exam question that used it.

7304 — Tubes, pipes and hollow profiles, seamless, of iron (other than cast iron) or steel

What is the CLASSIFICATION of a cold-drawn, seamless circular pipe? The pipe consists of 1% Carbon, 60% Iron, 25% Nickel, 13% Chromium, and 1% other elements, and has an outside diameter of 14 mm and a wall thickness of 1.9 mm.
October 2020 (AM) exam, question 50 · tests 7304.41.3005. Full question, answer and citation →

7306 — Other tubes, pipes and hollow profiles (for example, open seamed or welded, riveted or similarly closed), of iron or steel

What is the CLASSIFICATION of a welded, octagonal steel tube? The tube consists of 0.8% Carbon and 10.3% Chromium and has a wall thickness of 3.8 mm.
April 2023 exam, question 14 · tests 7306.69.7060. Full question, answer and citation →

7308 — Structures (excluding prefabricated buildings of heading 9406) and parts of structures (for example, bridges and bridge sections, lock gates, towers, lattice masts, roofs, roofing frameworks, doors and windows and their frames and thresholds for doors, shutters, balustrades, pillars and columns) of iron or steel; plates, rods, angles, shapes, sections, tubes and the like, prepared for use in structures, of iron or steel

What is the CLASSIFICATION of nonalloy (carbon) steel doors to be used in offshore windmill turbines? The doors will be used to access the monopile’s foundation and wind turbine.
May 2024 exam, question 33 · tests 7308.30.5050. Full question, answer and citation →

7318 — Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel

What would be the correct CLASSIFICATION of a screw for wood composed of 50% iron, 25% copper and 25% aluminum?
October 2021 exam, question 36 · tests 7318.12.0000. Full question, answer and citation →

7321 — Stoves, ranges, grates, cookers (including those with subsidiary boilers for central heating), barbecues, braziers, gas rings, plate warmers and similar nonelectric domestic appliances, and parts thereof, of iron or steel

What is the CLASSIFICATION for a portable tabletop gas stove ? The stove is made primarily of iron and steel , it is designed to use propane gas fuel, and is for domestic use.
April 2021 exam, question 20 · tests 7321.11.1030. Full question, answer and citation →

7323 — Table, kitchen or other household articles and parts thereof, of iron or steel; iron or steel wool; pot scourers and scouring or polishing pads, gloves and the like, of iron or steel

What is the CLASSIFICATION of a duster frame that is used as a cleaning tool? The duster frame is composed of an ethylene-vinyl acetate (EVA) foam covered strip of iron and a handle made of aluminum and polypropylene. It is comprised of 25% polypropylene, 30% aluminum, 10% EVA foam, and 35% iron.
October 2021 exam, question 40 · tests 7323.99.9080. Full question, answer and citation →

7326 — Other articles of iron or steel

Of the four choices below, which is the best CLASSIFICATION of a rectangular-shaped box/container made of 100% tinplate steel? The box measures 6 inches long by 4.25 inches wide by 2 inches high, and the top of the box is hinged. The box is used for children to hold and organize crayons and playthings.
October 2025 exam, question 33 · tests 7326.90.1000. Full question, answer and citation →

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