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U.S. Notes (con.) (31) Railroad air brake pipe fitting branch pipe tees of carbon or alloy steel (cast steel), not threaded, with welded sockets, each measuring not less than 7 cm by 5 cm by 5 cm but not more than 11 cm by 13 cm by 13 cm, weighing not less than 0.4 kg but not more than 2.4 kg, conforming to the Association of American Railroads (AAR) specifications S-400 (described in statistical reporting number 7307.19.9080) (32) Railroad tank car serpentine pipe fittings of carbon or alloy steel (cast steel), not threaded but welded to connect to pipes, each weighing not less than 0.9 kg but not more than 3.4 kg, measuring not less than 12 cm by 7 cm by 2 cm but not more than 16 cm by 13 cm by 11 cm, conforming to the Association of American Railroads (AAR) specifications M-1002 (described in statistical reporting number 7307.19.9080) (33) Tire chains of iron or nonalloy steel, with links not over 10 mm in diameter (described in statistical reporting number 7315.82.5000) (34) Bolts of galvanized steel, each with hexagonal heads which are fitted with plastic knobs to facilitate installation into a steel nut incorporated in awnings, having threads with a diameter of 6 mm or more (described in statistical reporting number 7318.15.2065) (35) Hose crimp collars of stainless steel, each weighing not more than 0.1 kg, measuring not more than 2.7 cm in diameter, not less than 1.4 cm but not more than 4.2 cm in length, not less than 1.3 cm but not more than 4.3 cm round (described in statistical reporting number 7326.90.8688) (36) Quick connect body sleeve couplings of steel, with cylinder shape, each measuring not more than 3 cm in length and not more than 4 cm in diameter (described in statistical reporting number 7326.90.8688) (37) Bismuth metal (described in statistical reporting number 8106.00.0000) (38) Flexible tubing of stainless steel, each with an inner hose with garden hose fittings, weighing not more than 1.5 kg, measuring not less than 760 cm but not more than 3,052 cm in length (described in statistical reporting number 8307.10.3000) (39) Buckles of stainless steel, each incorporating a snap fastener socket and adjustment teeth, designed for use with football helmet chin straps (described in statistical reporting number 8308.90.6000) (40) Sign plates, name plates, address plates, or similar plates of chromium plated base metals or of nickel or aluminum, each weighing not less than 4 g (described in statistical reporting number 8310.00.0000) (41) Parts suitable for use solely or principally with spark-ignition internal combustion piston engines of heading 8407 for marine propulsion (other than cast-iron parts, not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machinery or connecting rods) (described in statistical reporting number 8409.91.9290) (42) Parts suitable for use solely or principally with spark-ignition internal combustion piston engines of heading 8407 (other than for aircraft engines, cast-iron parts, not advanced beyond cleaning, and machined only for the removal of fins, gates, sprues and risers or to permit location in finishing machinery, for vehicles of subheading 8701.20 or heading 8702, 8703 or 8704, for marine propulsion engines or connecting rods) (described in statistical reporting number 8409.91.9990) (43) DC blowers for use in motor vehicle climate control systems, each measuring no less than 323 mm by 122 mm by 102 mm and no more than 357 mm by 214 mm by 167 mm (described in statistical reporting number 8414.59.6540) (44) DC centrifugal radial blowers, each measuring not less than 345 mm by 122 mm by 102 mm and not more than 355 mm by 173 mm by 145 mm, of an output of 100 W to 285 W, and weighing at least 1.80 kg but no more than 2.72 kg (described in statistical reporting number 8414.59.6560) (45) Electrical/battery operated axial leaf blowers (described in statistical reporting number 8414.59.6590) (46) Parts of fans, consisting of column assemblies comprising telescoping steel tubes, each with a mechanism to lock the assembly at a desired length, and front grills of steel, the foregoing for use in the manufacture of household pedestal fans (described in statistical reporting number 8414.90.1040) (47) Retail computing scales, digital with tactile keypad or VGA display, with a maximum weighing capacity of not less than 10 kg but not more than 15.5 kg, measuring not less than 15 cm in width by 20 cm [in] depth but not more than 41 cm in width by 32 cm in depth (described in statistical reporting number 8423.81.0030) Harmonized Tariff Schedule of the United States Revision 15 (2026) Annotated for Statistical Reporting Purposes XXII 99 - III - 231