1/4-20 UNC Double-End Stud
A double-ended fully threaded carbon steel stud with 1/4-inch diameter and 20 threads per inch, ideal for mounting applications in construction and HVAC systems. Classified under HTS 7318.15.50 for studs, which are threaded fasteners without heads, distinguishing them from headed bolts.
Import Duty Rates by Country of Origin
More Specific Codes
This product may fall under a more specific subheading:
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If hex socket drive head present
Socket cap studs with internal drive are 'machine screws' in cap screw subheading.
If for use in specific machinery like pumps
Articles of iron/steel for particular machines (Chapter 84/85) take precedence over general hardware.
If non-threaded versions
Lack of threading moves to 'other non-threaded articles' like pegs or pins.
Not sure which classification is right?
The Tariff Assistant works through the GRI rules on your specific product to reach the right HTS code — and can price the duty on it in the same conversation.
Import Tips & Compliance
• Provide engineering drawings showing full threading to confirm 'stud' status over bolts
• Label country of melt and pour for steel origin rules under Section XV notes
• Avoid misdeclaration as rivets (7318.23); studs require helical threading
Related Products under HTS 7318.15.50
3/8-16 UNF Alloy Steel Stud
High-strength alloy steel stud, 3/8-inch diameter with 16 fine threads per inch, for aerospace and pressure vessel bolting. Falls under 7318.15.50 as iron/steel studs, excluding wire dimensions over 16mm.
M6x1.0 Metric Threaded Rod Stud
Cut-to-length fully threaded M6 steel rod functioning as a stud for furniture assembly and shelving. HTS 7318.15.50 includes such uniform threaded rods used as headless bolts.
5/16-18 Fully Threaded Stud
Carbon steel stud with uniform 5/16-inch diameter and 18 coarse threads, applied in plumbing fixtures and pipe hangers. As a headless threaded fastener, it precisely matches HTS 7318.15.50 studs.
M12x1.75 High-Tensile Stud
Grade 8.8 high-tensile steel stud, M12 coarse thread for structural steel framing and bridges. Classified in 7318.15.50 for other steel studs meeting dimensional and form criteria.
1/2-13 UNC Heavy Hex Stud
Heavy series hex shoulder steel stud, 1/2-inch with 13 threads per inch for oilfield and mining equipment. HTS 7318.15.50 applies to stud variants without slotted/phillips drives.
M8x1.25 Hex Head Stud
A fully threaded steel stud with a hex head, 1.25mm pitch and 8mm diameter, used for secure fastening in machinery and automotive assemblies. It falls under HTS 7318.15.50 as a 'stud', defined as a headless bolt or screw with full or partial threading designed for bolting applications without a defined head for driving.