HS Code for Hex nuts

Hex nuts are classified under HS code 7318.16, which specifically covers threaded nuts made of iron or steel. This code is part of Chapter 73, which encompasses articles of iron or steel. Heading 7318 covers screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, washers, and similar articles. The classification is based on the physical characteristics of the item—being an internally threaded fastener designed to mate with a bolt or screw—and the material composition. Hexagonal nuts are the most common variety, but the code applies to various shapes of threaded nuts provided they are made of iron or steel. The classification process involves verifying that the product is threaded; non-threaded fasteners or "nuts" without internal threads would fall under different subheadings such as 7318.29. Furthermore, the material is critical; if the nut is made of copper or aluminum, it would be classified in Chapter 74 or 76, respectively. For 7318.16, the steel can be stainless, alloy, or non-alloy, though specific statistical suffixes may differentiate between these types in certain national tariffs. The presence of a hexagonal shape is the industry standard for these fasteners, facilitating the use of wrenches and sockets for tightening.

Products Included

• Standard hexagonal nuts
• Lock nuts (nyloc nuts)
• Heavy hex nuts
• Hex jam nuts
• Flange hex nuts
• Slotted hex nuts and castle nuts

Common Misclassification

Hex nuts are often confused with HS code 7318.15, which covers bolts and screws. While they are used together, nuts are distinct as the female-threaded component. Another common misclassification occurs with nuts made of non-ferrous metals; for example, brass hex nuts must be classified under 7415.33. Additionally, wing nuts or thumb nuts are sometimes incorrectly placed in general hardware categories, but they belong in 7318.16 if they are threaded and made of steel.

FAQ

What is the HS code for stainless steel hex nuts?

Stainless steel hex nuts are classified under HS code 7318.16. While the 6-digit code is the same as carbon steel nuts, the 8 or 10-digit code in many countries will specify the stainless steel material.

Does this code include nuts with nylon inserts?

Yes, hex nuts with nylon locking inserts (nyloc nuts) are classified under 7318.16 because the essential character of the item is the threaded steel nut.