8mm Carriage Bolt with Square Neck and Nut
Durable steel carriage bolt with 8mm diameter threads, round domed head, and integral square neck to prevent spinning, including nut and flat washer. Classified in HTS 7318.15.20.55 for round head bolts ≥6mm shipped with fasteners. Ideal for woodworking and outdoor construction where embedment is needed.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If having socket head (Allen)
Head style changes to non-round socket type, under different subheading.
If coach screws for wood
If threads optimized for wood penetration, shifts to coach screw category.
If imported as pipe flange fittings
End use in piping systems may classify under tube/pipe fittings.
Not sure which classification is right?
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Import Tips & Compliance
• Document head as 'round' (domed) despite square neck; customs measures outer profile
• Ensure all components (bolt, nut, washer) in same container per invoice to qualify for mixed shipment
• Avoid classifying as coach screws (7318.19); confirm no wood-screw threads
Related Products under HTS 7318.15.20.55
M6 Hex Head Cap Screw with Washer
A high-strength steel bolt with a 6mm diameter shank and threads, featuring a round hex head for wrench tightening, shipped with matching nut and washer. It falls under HTS 7318.15.20.55 as a bolt with round head, diameter 6mm or more, entered with nuts/washers in the same shipment, certified for structural applications. Commonly used in machinery assembly where high torque is required.
10mm Round Head Lag Bolt with Heavy Hex Nut
Heavy-duty lag bolt with 10mm diameter shank, partially threaded, round head design, paired with oversized hex nut and lock washer for secure fastening. HTS 7318.15.20.55 applies to these shipped-together round head bolts ≥6mm. Used in timber framing and structural builds.
6.5mm Diameter Round Washer Head Bolt Kit
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M8 Flange Bolt with Integrated Serrations and Nut
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7mm Acorn Cap Bolt with Nut
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