About HS Code 731811
This HS code specifically covers threaded coach screws, also widely known as lag screws, made of iron or steel. These heavy-duty fasteners are characterized by their distinctive hexagonal or square heads and coarse, deep threads, designed for robust connections in wood or with lag shields in masonry. They are indispensable in structural timber applications, such as securing heavy timbers, decking, fencing, and general construction where high shear and pull-out resistance are paramount. International trade is driven by the global construction industry, timber merchants, and hardware distributors. Importers include large construction firms, building material suppliers, and DIY retailers. Exporters are typically specialized fastener manufacturers and steel product companies with expertise in producing high-strength, durable fasteners. Key considerations include material strength, thread profile, corrosion resistance (e.g., hot-dip galvanized), and compliance with relevant building and safety standards.
Products Under This Code
Hex head coach screws, square head coach screws, galvanized lag screws, timber frame screws, structural wood screws, heavy-duty decking screws
Real World Examples
Simpson Strong-Tie lag screws, GRK Fasteners RSS screws, Spax PowerLags, FastenMaster LedgerLoks
Common Misclassification
Can be confused with 731812 (wood screws) which are generally smaller and have different head types, or 731815 (other threaded screws) if the specific coach screw characteristics are not recognized.
EU Regulatory Requirements
This product falls under the Carbon Border Adjustment Mechanism (CBAM). Importers to the EU must declare embedded carbon emissions and purchase CBAM certificates.
Products Classified Under 7318.11
Industry
This code belongs to the Automotive & Vehicles industry.
Trade Overview
China is a major exporter of these fasteners, with the USA and European countries being significant importers for their construction and woodworking industries.
Frequently Asked Questions
What is HS code 731811?
HS code 731811 covers: Iron or steel; threaded coach screws. This HS code specifically covers threaded coach screws, also widely known as lag screws, made of iron or steel. These heavy-duty fasteners are characterized by their distinctive hexagonal or square heads and coarse, deep threads, designed for robust connections in wood or with lag shields in masonry. They are indispensable in structural timber applications, such as securing heavy timbers, decking, fencing, and general construction where high shear and pull-out resistance are paramount. International trade is driven by the global construction industry, timber merchants, and hardware distributors. Importers include large construction firms, building material suppliers, and DIY retailers. Exporters are typically specialized fastener manufacturers and steel product companies with expertise in producing high-strength, durable fasteners. Key considerations include material strength, thread profile, corrosion resistance (e.g., hot-dip galvanized), and compliance with relevant building and safety standards.
What products fall under HS code 731811?
Hex head coach screws, square head coach screws, galvanized lag screws, timber frame screws, structural wood screws, heavy-duty decking screws
What are common misclassifications for HS code 731811?
Can be confused with 731812 (wood screws) which are generally smaller and have different head types, or 731815 (other threaded screws) if the specific coach screw characteristics are not recognized.
How is HS code 731811 structured?
HS code 731811 is a 6-digit subheading under the Harmonized System. The first 2 digits (73) identify the chapter, digits 3-4 (18) identify the heading, and digits 5-6 (11) specify the subheading. This code is standardized globally by the World Customs Organization.