HS Code for Spring washers

Spring washers are classified under HS code 7318.21. This code is situated within Chapter 73, which covers articles of iron or steel. Heading 7318 specifically includes screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, and washers. Within this heading, the system differentiates between threaded and non-threaded articles. Spring washers are non-threaded fasteners designed to prevent loosening due to vibration or to maintain tension in a joint. The subcategory 7318.21 is dedicated specifically to spring washers and other lock washers. The classification is determined by the functional design of the washer—specifically its ability to exert a spring force—and its material composition of iron or steel.

Products Included

• Split ring lock washers
• Helical spring washers
• Belleville washers (conical spring washers)
• Wave spring washers
• Curved spring washers
• Toothed lock washers

Common Misclassification

Spring washers are often confused with general non-threaded washers classified under HS code 7318.22. The distinction lies in the locking or tensioning function; if the washer is flat and lacks a spring-action design, it belongs in 7318.22. Another misclassification occurs with HS code 7320, which covers general springs. While spring washers exhibit spring-like properties, they are legally classified as fasteners under 7318 because their primary purpose is to secure components in a bolted or screwed joint.

FAQ

What is the HS code for spring washers?

The HS code for spring washers made of iron or steel is 7318.21.

Are stainless steel spring washers classified differently?

No, they are still classified under 7318.21 as they are articles of steel, though specific national tariff lines may distinguish between alloy and non-alloy steel.