HS Code for Screws
Threaded fasteners such as screws point toward heading 7318 of the HTSUS, within the chapter 73 provisions for articles of iron or steel. The heading is organized by screw type: coach screws point toward 7318.11, other wood screws toward 7318.12, self-tapping screws toward 7318.14, other screws and bolts toward 7318.15, and other threaded articles toward 7318.19. Several lines then split further by material (notably stainless steel) and by diameter or length. Duty treatment varies widely (from Free for many machine screws up to 12.5% for wood and coach screws), so the screw type and material both matter. Identifying the type of screw first, then its material and dimensions, is the starting point for exploring the most appropriate subheading.
HTS Codes for Screws
| HTS Code | Description | Duty Rate |
|---|---|---|
| 7318.11.00.00 | Coach screws Coach screws (heavy square- or hex-head wood screws), of iron or steel | 12.50% |
| 7318.12.00.00 | Other wood screws Wood screws other than coach screws, of iron or steel | 12.50% |
| 7318.14.10.30 | Self-tapping screws of stainless steel, shank or thread diameter under 6 mm Self-tapping screws of stainless steel with a shank or thread diameter of less than 6 mm | 6.20% |
| 7318.14.10.60 | Self-tapping screws of iron or steel (other than stainless), shank or thread diameter under 6 mm | 6.20% |
| 7318.14.50.20 | Self-tapping screws of stainless steel, shank or thread diameter 6 mm or more Self-tapping screws of stainless steel with a shank or thread diameter of 6 mm or more | 8.60% |
| 7318.14.50.80 | Self-tapping screws of iron or steel (other than stainless), shank or thread diameter 6 mm or more | 8.60% |
| 7318.15.40.00 | Machine screws 9.5 mm or more in length and 3.2 mm or more in diameter (not including cap screws) Machine screws at least 9.5 mm long and 3.2 mm in diameter, excluding cap screws | Free |
| 7318.15.60.10 | Socket screws of stainless steel, shank or thread diameter under 6 mm | 6.20% |
| 7318.15.80.20 | Set screws, shank or thread diameter 6 mm or more | 8.50% |
| 7318.19.00.00 | Other threaded articles Other threaded fasteners of heading 7318 not elsewhere specified | 5.70% |
How to Approach Classification for Screws
Screws point toward heading 7318 of the HTSUS, the provision for screws, bolts, nuts, coach screws, washers and similar threaded articles of iron or steel. Because the heading gathers threaded fasteners specifically, it is a natural starting point, and the subheadings then separate screws primarily by their type.
Wood screws are one branch. Coach screws (the heavy square- or hex-headed screws driven into timber) point toward subheading 7318.11, while ordinary wood screws point toward 7318.12. Both of these carry the same, relatively high duty treatment, so recognizing a fastener as a wood screw is an important early step.
Self-tapping screws form their own branch at 7318.14, and here the subheading splits further by material and size, for example, self-tapping screws of stainless steel are broken out, and the diameter of the shank or thread (under 6 mm versus 6 mm or more) separates the statistical lines. Other screws, including machine screws, socket screws and set screws, point toward 7318.15, which they share with bolts and studs; within it, machine screws of qualifying size, socket screws and set screws each have their own lines, split further by diameter and, in places, by stainless steel. Threaded articles of the heading that are not described by the earlier subheadings point toward the residual 7318.19.
A practical approach is to identify the type of screw first (wood, self-tapping, machine, set or other), then confirm the material (stainless steel is a frequent breakout), and finally the dimensions where the subheading calls for them. That sequence usually points toward a single most-appropriate line. It is worth keeping the distinction between screws and their close neighbors in mind: bolts, studs, nuts, washers and rivets have their own subheadings or lines within 7318, and screws made of other metals, such as aluminum or copper fasteners, follow their own base-metal headings rather than 7318.
Duty Rate Overview
General duty rates for screws vary widely with the type and material. Coach screws and other wood screws carry a general rate around 12.5%, the highest here, while self-tapping screws sit around 6.2% below 6 mm in diameter and 8.6% at 6 mm or more. Among other screws under 7318.15, qualifying machine screws enter at a general rate of Free, small socket screws sit around 6.2%, set screws around 8.5%, and the residual 'other threaded articles' line around 5.7%. Because the range spans from Free to 12.5%, confirming both the screw type and its dimensions is worthwhile. Preferential rates under free trade agreements may reduce or eliminate duties for qualifying origins. These figures are estimates for general planning purposes only.