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HSChapter 73
U.S. imports of threaded screws and bolts (nesoi) of iron or steel (HS 731815) totaled $212.3M in April 2026, traded with 70 countries.
Importers of Threaded Screws and Bolts (NESOI) of Iron or Steel paid $108.4M in duties in April 2026 — an effective duty rate of 54% on $199.6M in dutiable value, based on actual customs collections rather than the published tariff schedule.
Last updated: April 2026 dataThreaded screws and bolts not elsewhere specified — including structural bolts, track bolts, anchor bolts, hex-head cap screws, socket screws, machine screws, and studs — form one of the most granularly subdivided headings in the iron and steel fastener schedule, with more than two dozen 10-digit tariff lines distinguishing head style, thread diameter, and alloy content. Taiwan and China are the leading US suppliers, with South Korea, Japan, and Germany also significant sources. Structural bolts and continuously threaded rod studs are particularly important inputs for the construction and infrastructure sectors, and Chinese-origin goods in this heading are broadly subject to Section 301 tariffs.
AI-written summary of the official U.S. Census Bureau trade figures on this page — verify before relying on it.
Structural bolts (7318152030) are specifically designed for use in steel construction connections and typically conform to recognized structural standards (such as ASTM F3125). They are distinguished from track bolts (7318152020), anchor bolts (7318152041), and general hex-head bolts (7318152065) by their intended load-bearing application and specification compliance. Misclassifying a structural bolt as a general hex bolt — or vice versa — can result in an incorrect duty rate, so verifying the applicable ASTM or equivalent standard is advisable.
Standard studs of iron or steel fall under 7318155090 (or 7318155030 for stainless), while continuously threaded rod — threaded along its entire length rather than at the ends only — is separately classified under 7318155051 (alloy steel) or 7318155056 (iron/non-alloy steel). The distinction matters because continuously threaded rod is a commodity construction product with different pricing and trade-remedy exposure than precision-machined studs.
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Monthly import values over time
HS10 import codes under this HS6 parent. Source: U.S. Harmonized Tariff Schedule.
| Code | Description | Import Value | Effective Tariff % | Duty Collected |
|---|---|---|---|---|
| 7318158066 | CAP SCREW IRON/STL HEXAGONL HEAD THRD DIA GT=6MM | $26.6M | 58.76% | $14.2M |
| 7318152095 | BLTS, BLTS W NUTS/WSHRS IR/ST THRFDS 6MM OM NESOI | $25.2M | 52.24% | $12.2M |
| 7318158085 | OTH SCREWS, IRN/STL, W THREAD DIAM 6MM OR MR NESOI | $19.4M | 54.93% | $9.5M |
| 7318152065 | BOLTS W HEXAGONL HEADS, IR/STL, THRDS 6MM OM NESOI | $18.5M | 53.83% | $9.9M |
| 7318158069 | SCREW IRN/STL HEXAGONL HEADS THRD DIA GT=6MM NESOI | $16.6M | 57.96% | $9.4M |
| 7318155090 | STUDS OF IRON OR STEEL, THREADED, NESOI | $13.4M | 49.70% | $6.2M |
| 7318154000 | MACHINE SCREWS, IOS, LENGTH 9.5MM OM DIAM 3.2MM OM | $11.5M | 48.10% | $5.4M |
| 7318156080 | SCREWS,IRON/STEEL;SHANK/THREAD DIAM LT 6MM, NESOI | $8.1M | 52.99% | $4.3M |
| 7318158045 | SOCKET SCREWS IRON STEEL THREAD DIAM GT=6MM NESOI | $7.3M | 58.85% | $3.7M |
| 7318155051 | CONTINUOUSLY THREADED ROD STUDS OF ALLOY STL NESOI | $7.0M | 54.28% | $3.6M |
| 7318158055 | SCREW STNL STL W HEXAGONL HDS THRD DIAM GT=6MM NES | $6.9M | 59.40% | $4.0M |
| 7318152055 | BOLTS, IRON/STEEL, ROUND HEADS, THRDS 6MM OM NESOI | $6.6M | 53.82% | $3.5M |
| 7318152010 | BOLTS INC W NUTS/WSHRS, IRN/STL THREADS LS THN 6MM | $4.9M | 48.25% | $2.2M |
| 7318152030 | STRUCTURAL BOLTS, IRON/STEEL, THREAD DIAM 6MM OM | $4.6M | 54.59% | $2.2M |
| 7318152091 | BLTS AND BLTS W NUTS/WSHRS SS THRFDS 6MM OM,NESOI | $4.6M | 47.78% | $2.2M |
| 7318155030 | STUDS OF STAINLESS STEEL, THREADED | $4.5M | 52.22% | $2.3M |
| 7318155056 | CONTINUOUSLY THREADED ROD STUDS IRON/NON-ALLOY STL | $4.2M | 48.74% | $2.1M |
| 7318152061 | BOLTS W HEXAGONL HDS, STAIN STL,THRDS 6MM OR MORE | $4.0M | 51.62% | $2.0M |
| 7318152020 | TRACK BOLTS, IRON OR STEEL, W THREADS 6MM OR MORE | $3.5M | 59.23% | $2.1M |
| 7318152046 | BENT BOLTS IRON/STEEL, THREAD W/ DIAM GT=6MM NESOI | $2.9M | 55.89% | $1.2M |
| 7318156070 | SCREWS;STNLS STEEL;SHANK/THREAD DIAM LT 6MM, NESOI | $2.3M | 57.75% | $1.3M |
| 7318158082 | OTH SCREWS,STNLS STL,W THREAD DIAM 6MM OR MR NESOI | $1.7M | 58.32% | $940K |
| 7318158030 | SOCKET SCREWS STAINLS STL THREAD DIAM 6MM OR MORE | $1.6M | 59.79% | $952K |
| 7318156040 | SOCKET SCREWS ;IRON/STL;SHANK/THREAD DIAM <6MM,NES | $1.3M | 55.93% | $748K |
| 7318156010 | SOCKET SCREW;STNLS STEEL;SHANK/THREAD DIAM LT 6M | $1.3M | 60.48% | $770K |
| 7318152051 | BOLTS,STNLESS STL,RND HDS,THRDS 6MM OR MORE,NESOI | $1.1M | 51.80% | $573K |
| 7318158020 | SET SCREWS IRN/STL THREAD DIAMETER 6MM OR MORE NES | $1.1M | 60.41% | $522K |
| 7318152041 | RT ANGLE ANCHOR BOLTS IR/STL, THRED W/ DIAM GT=6MM | $1.0M | 55.47% | $561K |
CAP SCREW IRON/STL HEXAGONL HEAD THRD DIA GT=6MM
BLTS, BLTS W NUTS/WSHRS IR/ST THRFDS 6MM OM NESOI
OTH SCREWS, IRN/STL, W THREAD DIAM 6MM OR MR NESOI
BOLTS W HEXAGONL HEADS, IR/STL, THRDS 6MM OM NESOI
SCREW IRN/STL HEXAGONL HEADS THRD DIA GT=6MM NESOI
STUDS OF IRON OR STEEL, THREADED, NESOI
MACHINE SCREWS, IOS, LENGTH 9.5MM OM DIAM 3.2MM OM
SCREWS,IRON/STEEL;SHANK/THREAD DIAM LT 6MM, NESOI
SOCKET SCREWS IRON STEEL THREAD DIAM GT=6MM NESOI
CONTINUOUSLY THREADED ROD STUDS OF ALLOY STL NESOI
SCREW STNL STL W HEXAGONL HDS THRD DIAM GT=6MM NES
BOLTS, IRON/STEEL, ROUND HEADS, THRDS 6MM OM NESOI
BOLTS INC W NUTS/WSHRS, IRN/STL THREADS LS THN 6MM
STRUCTURAL BOLTS, IRON/STEEL, THREAD DIAM 6MM OM
BLTS AND BLTS W NUTS/WSHRS SS THRFDS 6MM OM,NESOI
STUDS OF STAINLESS STEEL, THREADED
CONTINUOUSLY THREADED ROD STUDS IRON/NON-ALLOY STL
BOLTS W HEXAGONL HDS, STAIN STL,THRDS 6MM OR MORE
TRACK BOLTS, IRON OR STEEL, W THREADS 6MM OR MORE
BENT BOLTS IRON/STEEL, THREAD W/ DIAM GT=6MM NESOI
SCREWS;STNLS STEEL;SHANK/THREAD DIAM LT 6MM, NESOI
OTH SCREWS,STNLS STL,W THREAD DIAM 6MM OR MR NESOI
SOCKET SCREWS STAINLS STL THREAD DIAM 6MM OR MORE
SOCKET SCREWS ;IRON/STL;SHANK/THREAD DIAM <6MM,NES
SOCKET SCREW;STNLS STEEL;SHANK/THREAD DIAM LT 6M
BOLTS,STNLESS STL,RND HDS,THRDS 6MM OR MORE,NESOI
SET SCREWS IRN/STL THREAD DIAMETER 6MM OR MORE NES
RT ANGLE ANCHOR BOLTS IR/STL, THRED W/ DIAM GT=6MM
HS10 export codes under this HS6 parent. Source: U.S. Schedule B export classification.
| Code | Description | Export Value |
|---|---|---|
| 7318159000 | THREADED FASTENERS NESOI OF IRON OR STEEL | $111.3M |
| 7318152000 | BOLTS W/WO THEIR NUTS O WSHRS, OF IRON OR STEEL | $92.3M |
| 7318155000 | STUDS OF IRON OR STEEL, THREADED | $20.1M |
THREADED FASTENERS NESOI OF IRON OR STEEL
12.4M kg
BOLTS W/WO THEIR NUTS O WSHRS, OF IRON OR STEEL
7.7M kg
STUDS OF IRON OR STEEL, THREADED
2.4M kg
SELF-TAPPING SCREWS OF IRON OR STEEL
HS 731814
| State | Imports | Exports | Balance |
|---|---|---|---|
| Texas | $25.7M | $33.1M | +$7.4M |
| Michigan | $15.0M | $35.9M | +$20.8M |
| California | $20.9M | $27.8M | +$6.9M |
| Port | Imports | Exports | Balance |
|---|---|---|---|
| LOS ANGELES, CA | $47.3M | -- | -$47.3M |
| LAREDO, TX | $2.8M | $42.1M | +$39.3M |
| LOW VALUE | -- | $25.5M | +$25.5M |