Iron or steel; threaded nuts

HS v2022 Code: 731816

About iron or steel; threaded nuts

HS code 731816 covers the classification of iron or steel threaded nuts, which are essential fasteners used across a wide range of industries. These small but vital components play a crucial role in the assembly and maintenance of machinery, vehicles, and various other products. The global market for threaded nuts is driven by the ongoing demand from the manufacturing, construction, and automotive sectors, making it an integral part of the broader industrial economy.

Production process

Threaded nuts are typically produced through a combination of metalworking processes, including stamping, forging, and threading. The raw material, usually iron or steel, is first cut or stamped into the desired shape. The blank is then threaded, either through a rolling or cutting process, to create the internal threads that allow the nut to be securely fastened. Quality control and finishing steps, such as heat treatment or surface coating, may also be applied to enhance the nut's strength, durability, and corrosion resistance.

Production inputs

The primary inputs for the production of threaded nuts include iron or steel raw materials, as well as specialized machinery and tools for the metalworking processes. Depending on the specific application, additional inputs such as lubricants, coatings, or heat-treating equipment may be required to meet performance and quality standards. The availability and cost of these inputs can significantly impact the overall production and pricing of threaded nuts.

Production outputs

Threaded nuts produced under HS code 731816 are used in a wide range of applications, including 731815 Iron or steel; threaded articles, 840731 Spark-ignition reciprocating or rotary internal combustion piston engines for vehicles, and 842123 Machinery and apparatus for filtering or purifying gases. These nuts are essential components in the assembly and maintenance of machinery, vehicles, and various industrial equipment, making them a crucial output for supporting the broader manufacturing and construction industries.

Revisions to 731816

Classification codes are adjusted frequently. The code may have been revised or replaced between system versions. The table below shows the history (newest to oldest) of the code 731816. The most recent 1 version of this code (731816) is in the HS v2022 system (this version):

This page shows the most recent version of code 731816.

Family tree for iron or steel; threaded nuts

    graph LR
    A["<a href='/classifications/hs/v2022/73'>73: Iron or steel articles</a>"]
A --> B["<a href='/classifications/hs/v2022/7318'>7318: Screws, bolts, nuts, coach screws, screw hooks, rivets, cotters, cotter-pins, washers (including spring washers) and similar articles, of iron or steel</a>"]
B --> C["<a href='/classifications/hs/v2022/731816'>731816: Iron or steel; threaded nuts</a>"]

    B --> D["<a href='/classifications/hs/v2022/731811'>731811: Iron or steel; threaded coach screws</a>"]
B --> E["<a href='/classifications/hs/v2022/731812'>731812: Iron or steel; threaded wood screws other than coach screws</a>"]
B --> F["<a href='/classifications/hs/v2022/731813'>731813: Iron or steel; threaded screw hooks and screw rings</a>"]
B --> G["<a href='/classifications/hs/v2022/731814'>731814: Iron or steel; threaded self-tapping screws</a>"]
B --> H["<a href='/classifications/hs/v2022/731815'>731815: Iron or steel; threaded screws and bolts n.e.c. in item no. 7318.1, whether or not with their nuts or washers</a>"]
B --> I["<a href='/classifications/hs/v2022/731819'>731819: Iron or steel; threaded screws, bolts and nuts n.e.c. in item no. 7318.1</a>"]
B --> J["<a href='/classifications/hs/v2022/731821'>731821: Iron or steel; non-threaded spring washers and other lock washers</a>"]
B --> K["<a href='/classifications/hs/v2022/731822'>731822: Iron or steel; non-threaded washers, excluding spring and lock</a>"]
B --> L["<a href='/classifications/hs/v2022/731823'>731823: Iron or steel; non-threaded rivets</a>"]
B --> M["<a href='/classifications/hs/v2022/731824'>731824: Iron or steel; non-threaded cotters and cotter-pins</a>"]
B --> N["<a href='/classifications/hs/v2022/731829'>731829: Iron or steel; non-threaded articles, n.e.c. in item no. 7318.2</a>"]

    

    %% Color coordination by level

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    classDef level2 color:#000,fill:#e0a458,stroke:#333,stroke-width:1px
    classDef level3 color:#000,fill:#419d78,stroke:#333,stroke-width:1px
    classDef level4 color:#000,fill:#c04abc,stroke:#333,stroke-width:1px
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    classDef level6 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef highlight color:#000,fill:#fff,stroke:#000,stroke-width:5px



  %% Apply classes
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class B level4
class C level6
class D level6
class E level6
class F level6
class G level6
class H level6
class I level6
class J level6
class K level6
class L level6
class M level6
class N level6

  class C highlight

  %% class A level1
  %% class B,C level2
  %% class D,E,F,G,H,I level2
  %% class J,K,L,M,N,O,P level3
  %% class C highlight