HS Code for Coach screws

Coach screws, also known as lag screws, are classified under HS code 731811. This classification is determined by their physical characteristics as heavy-duty threaded fasteners made of iron or steel. Unlike standard wood screws, coach screws are designed with a hexagonal or square head to be driven by a wrench or socket rather than a screwdriver. They feature a deep, coarse thread specifically intended for high-torque applications in timber or for securing heavy metal brackets to wooden structures. Under the Harmonized System, Chapter 73 covers articles of iron or steel, and heading 7318 specifically addresses screws, bolts, nuts, and similar fasteners. Subheading 731811 is a specific provision for coach screws, distinguishing them from other types of wood screws or bolts based on their unique thread profile and head design. The classification remains consistent regardless of whether the screw is galvanized, zinc-plated, or stainless steel, provided the base metal is iron or steel.

Products Included

• Hexagonal head coach screws
• Square head lag screws
• Heavy-duty timber screws with lag threads
• Zinc-plated steel coach screws
• Galvanized lag bolts for outdoor construction
• Stainless steel coach screws for marine use

Common Misclassification

Coach screws are often misclassified under HS code 731812, which covers other wood screws. The distinction lies in the head type and the thickness of the shank; 731812 is generally for smaller, slotted or recessed head screws. Another common error is using HS code 731815, which covers other screws and bolts. While coach screws share characteristics with bolts, the fact that they are pointed and designed to create their own thread in wood specifically mandates the use of 731811. Using a general bolt code can lead to incorrect duty assessments during customs clearance.

FAQ

What is the HS code for coach screws?

The specific HS code for threaded coach screws made of iron or steel is 731811.

Are lag bolts and coach screws the same for HS classification?

Yes, in most international trade contexts, lag bolts are considered coach screws and are classified under 731811 because they are threaded for wood and have a bolt-like head.