M5.5 Flange Bolts with Integrated Nuts
Flange head bolts with 5.5 mm threads and attached nut plates, of iron or steel for automotive and appliance use. Classified in 7318.15.20.10 for diameter under 6 mm and shipped as complete bolt/nut assemblies.
Import Duty Rates by Country of Origin
Alternative Classifications
This product could be classified differently depending on its characteristics or intended use.
If diameter 6 mm or greater
Statistical break at 6 mm shifts to next subheading.
If imported as vehicle body parts
End-use as suspension components changes to auto parts chapter.
If articulated screws (e.g., wing screws)
Has turning slot/notch for hand-tightening, distinct from standard bolts.
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 thread/shank specs for CBP review
• Avoid mixing sizes in one shipment to prevent reclassification
• Comply with ASTM standards labeling for quality assurance
Related Products under HTS 7318.15.20.10
M6 Hex Head Bolts with Nuts
Carbon steel hex head bolts with a 5.5 mm thread diameter, shipped with matching nuts and washers for assembly. These are classified under HTS 7318.15.20.10 due to their shank/thread diameter under 6 mm and being entered together as bolts with nuts/washers. Commonly used in machinery and furniture assembly.
M4 Socket Cap Bolts with Washers
Alloy steel socket cap bolts featuring 4 mm diameter threads, packaged with flat washers in the same shipment. Fits HTS 7318.15.20.10 as bolts with washers under 6 mm diameter, ideal for electronic equipment and automotive trim.
M3.5 Cap Screws with Lock Washers
Precision cap screws with 3.5 mm shank diameter, bundled with split lock washers for vibration resistance. Under HTS 7318.15.20.10 as small-diameter bolt sets for computers and small machinery.
M4.8 Structural Bolts with Hex Nuts
High-tensile structural bolts at 4.8 mm thread diameter with heavy hex nuts and washers for construction framing. HTS 7318.15.20.10 applies to these under-6 mm shipped sets.
M2.5 Electronics Bolts with Flat Washers
Fine-thread M2.5 bolts with 2.5 mm diameter for circuit boards, shipped with flat washers. Qualifies for 7318.15.20.10 as small shank bolt/washer sets.
M5 Carriage Bolts with Square Neck Nuts
Round head carriage bolts with 5 mm threads and square neck nuts for woodworking, entered as a shipped set under 7318.15.20.10.