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💾 Data Updated: Latest version • Last updated: December 09, 2025

7318.21.00.30 - Helical spring lock washers 🖩

Details

FieldValue
Unit of Quantitykg
General Rate of Duty (Column 1 - General)5.8%
Special Rate of Duty (Column 1 - Special)Free (A,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) 2.9% (JP)
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AU 🇦🇺
B 🇨🇦
BH 🇧🇭
CL 🇨🇱
CO 🇨🇴
D 🇦🇴 🇧🇯 🇧🇼 🇧🇫 🇨🇻 🇨🇫 🇹🇩 🇰🇲 🇨🇮 🇨🇩 🇩🇯 🇸🇿 🇪🇹 🇬🇦 🇬🇲 🇬🇭 🇬🇳 🇬🇼 🇰🇪 🇱🇸 🇱🇷 🇲🇬 🇲🇼 🇲🇱 🇲🇺 🇲🇿 🇳🇦 🇳🇪 🇳🇬 🇨🇬 🇷🇼 🇸🇳 🇸🇱 🇿🇦 🇸🇹 🇹🇿 🇹🇬 🇺🇬 🇿🇲
E 🇦🇬 🇦🇼 🇧🇸 🇧🇧 🇧🇿 🇻🇬 🇨🇼 🇩🇲 🇬🇩 🇬🇾 🇭🇹 🇯🇲 🇲🇸 NE 🇰🇳 🇱🇨 🇻🇨 🇹🇹
IL 🇮🇱
JO 🇯🇴
JP 🇯🇵
KR 🇰🇷
MA 🇲🇦
OM 🇴🇲
P 🇨🇷 🇩🇴 🇸🇻 🇬🇹 🇭🇳 🇳🇮
PA 🇵🇦
PE 🇵🇪
S 🇨🇦 🇲🇽
SG 🇸🇬
Column 2 Rate of Duty35%
Quota QuantityN/A
Additional DutiesN/A
About Duty Rates: Rates are divided into Column 1 and Column 2. Column 1 is subdivided into General (normal trade relations rates for all countries not eligible for special programs) and Special (preferential rates for countries with free trade agreements or preference programs). Column 2 rates apply to products from Cuba, North Korea, Belarus, and Russia. When no special rate exists for a classification, General rates apply.

Overview

This HTS category, 7318.21.00.30, specifically covers helical spring lock washers manufactured from iron or steel. These washers are designed with a characteristic spiral or helical shape, which creates a spring-like action when compressed between a bolt or screw head and the surface of the material being fastened. This spring action is intended to exert a continuous tension, preventing loosening due to vibration or thermal expansion.

Within the broader classification of "Spring washers and other lock washers," this subcategory is distinguished from its sibling category, 7318.21.00.90 ("Other"), by its specific helical construction. While "other" lock washers might encompass a variety of designs intended for similar purposes, this heading is exclusively for those featuring a helical, or coiled, spring configuration. This distinction is crucial for accurate customs declaration, ensuring that the precise type of lock washer is identified.

As this is a leaf node in the HTS classification, there are no further subdivisions. Therefore, the classification is complete at this level. When classifying articles under this code, the primary considerations are the material (iron or steel) and the distinctive helical spring design of the washer, as opposed to other types of lock washers such as split or toothed washers.

Frequently Asked Questions

›What is HTS code 7318.21.00.30?
HTS code 7318.21.00.30 covers Helical spring lock washers under the US Harmonized Tariff Schedule. It falls under Chapter 73: Articles of iron or steel.
›What products are classified under 7318.21.00.30?
This classification covers Helical spring lock washers. It is a subcategory of Spring washers and other lock washers (7318.21.00).
›What is the import duty rate for 7318.21.00.30?
The general rate of duty for HTS 7318.21.00.30 is 5.8%. Special preferential rates may apply: Free (A,AU,B,BH,CL,CO,D,E,IL,JO,KR,MA,OM,P,PA,PE,S,SG) 2.9% (JP). The Column 2 rate is 35%.
›What unit of quantity is used for 7318.21.00.30?
Imports under HTS 7318.21.00.30 are measured in kg.
›Are there special tariff programs for 7318.21.00.30?
Yes, preferential rates may apply under programs including: Generalized System of Preferences (GSP) (duty-free treatment)., Australia Special Rate, Automotive Products Trade Act (APTA) (duty-free treatment), Bahrain Special Rate, Chile Special Rate. And 13 more programs.
Go up to 7318.21.00 · Go up to Chapter 73: Articles of iron or steel

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