Studs

This code covers studs – which are a type of threaded fastener – made of iron or steel. Use this code when classifying these items for import, noting they generally receive free duty under standard trade agreements, as detailed within Chapter 73.

Detailed information for HTS Code 7318.15.50

AI Summary

This tariff classification falls within Chapter 73, which covers articles of iron or steel, specifically dealing with screws, bolts, nuts, and similar items. Code 7318.15.50 specifically covers studs, which are threaded fasteners without nuts or washers. Several subdivisions exist to further classify studs based on material—stainless steel (7318.15.50.30), continuously threaded rod of alloy steel (7318.15.50.51), other continuously threaded rod (7318.15.50.56), and other materials (7318.15.50.90)—so choose the suffix that accurately reflects the stud's composition.

Chapter	Chapter 73 - Articles of iron or steel
Section	Section XV - Base Metals and Articles of Base Metal

Duty snapshot

Quick reference for the duty outcomes tied to this HTS line.

General Duty

Free

Standard trade partners (NTR)

Special Duty

N/A

Eligible FTA or preference programs

The general rate of duty for HTS code 7318.15.50 (Studs) is Free, meaning no duty is assessed on imports falling under this code. Imports from Standard Trade Partners (NTR) are also subject to this free rate. Eligible goods under FTA or preference programs may also qualify for a special duty rate, though it is not specified what that rate is. All imports under this code and its subdivisions (7318.15.50.30, 7318.15.50.51, 7318.15.50.56, 7318.15.50.90) must be reported in kilograms (kg).

Rate of Duty (Column 2): 45%

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Code subdivisions

7318.15.50.30

Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Studs > Of stainless steel

Parent subheading for dairy herd replacements

7318.15.50.51

Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Studs > Other: > Continuously threaded rod: > Of alloy steel

7318.15.50.56

Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Studs > Other: > Continuously threaded rod: > Other

7318.15.50.90

Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter pins, washers (including spring washers) and similar articles, of iron or steel: > Threaded articles: > Other screws and bolts, whether or not with their nuts or washers: > Studs > Other: > Other

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Chapter & section notes

Chapter notes

Harmonized Tariff Schedule of the United States Revision 29 (2025) Annotated for Statistical Reporting Purposes CHAPTER 73 ARTICLES OF IRON OR STEEL XV 73-1 Notes 1. In this chapter the expression "cast iron" applies to products obtained by casting in which iron predominates by weight over each of the other elements and which do not comply with the chemical composition of steel as defined in Note 1(d) to chapter 72. 2. In this chapter the word "wire" means hot- or cold-formed products of any cross-sectional shape, of which no cross-sectional dimension exceeds 16 mm. Additional U.S. Notes 1. For the purposes of heading 7304 or 7306, the rate of duty "Free (C)" appearing in the "Special" subcolumn applies only to tubes and pipes with attached fittings, suitable for conducting gases or liquids. 2. For the purposes of subheading 7307.19.30, the expression "ductile fittings" refers to fittings which contain over 2.5 percent carbon and over 0.02 percent of magnesium or of magnesium and cerium, by weight. Statistical Note 1. For the purposes of statistical reporting numbers 7310.10.0005, 7310.29.0020 and 7310.29.0055, “refillable stainless steel kegs, whether or not pressurized” refers to cylindrical kegs for liquid beverages, each keg with a domed top and bottom and a single neck piece, designed for a coupler (valve) system and an extractor tube (spear) by which the keg can be cleaned, filled and dispense the liquid contents. Harmonized Tariff Schedule of the United States Revision 29 (2025) Annotated for Statistical Reporting Purposes XV 73-2

Section notes

SECTION XV BASE METALS AND ARTICLES OF BASE METAL XV-1 Notes 1. This section does not cover: (a) Prepared paints, inks or other products with a basis of metallic flakes or powder (headings 3207 to 3210, 3212, 3213 or 3215); (b) Ferrocerium or other pyrophoric alloys (heading 3606); (c) Headgear or parts thereof of heading 6506 or 6507; (d) Umbrella frames or other articles of heading 6603; (e) Goods of

Latest update

Last updated

November 15, 2025

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