Iron or steel; threaded screw hooks and screw rings

HS v2017 Code: 731813

About iron or steel; threaded screw hooks and screw rings

HS code 731813 covers the classification of threaded screw hooks and screw rings made of iron or steel. These fasteners are essential components in a wide range of industries, from construction and manufacturing to furniture and home goods. Their versatility and durability make them indispensable in numerous applications, contributing to the overall strength and stability of various products and structures.

Production process

The production of threaded screw hooks and screw rings typically involves a multi-step process. First, the raw materials, such as iron or steel, are sourced and prepared. The metal is then shaped and formed into the desired hook or ring shape, often through processes like stamping, casting, or forging. The threads are then cut or rolled onto the fasteners, ensuring a secure and reliable connection. Finally, the products may undergo additional finishing steps, such as heat treatment or coating, to enhance their corrosion resistance and aesthetic appeal.

Production inputs

The primary inputs for the production of HS code 731813 items are iron or steel, the raw materials used to manufacture the fasteners. Additionally, specialized machinery and tools, such as stamping presses, threading machines, and heat treatment equipment, are essential for the various production stages. Skilled labor, including metalworkers, machinists, and quality control personnel, is also a crucial input for this industry.

Production outputs

The main outputs of HS code 731813 are threaded screw hooks and screw rings, which are widely used in a variety of industries. These fasteners are often consumed by manufacturers of 732690 Other articles of iron or steel, 732599 Other mountings, fittings and similar articles suitable for buildings, and 940320 Metal furniture, among others. The versatility of these products allows them to be integrated into a broad range of applications, contributing to the overall functionality and structural integrity of the final products.

Revisions to 731813

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 731813. The most recent 1 version of this code (731813) is in the HS v2022 system:

This page shows a legacy version of code 731813 ( HS v2017).

Newer versions

Family tree for iron or steel; threaded screw hooks and screw rings

    graph LR
    A["<a href='/classifications/hs/v2017/73'>73: Iron or steel articles</a>"]
A --> B["<a href='/classifications/hs/v2017/7318'>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/v2017/731813'>731813: Iron or steel; threaded screw hooks and screw rings</a>"]

    B --> D["<a href='/classifications/hs/v2017/731811'>731811: Iron or steel; threaded coach screws</a>"]
B --> E["<a href='/classifications/hs/v2017/731812'>731812: Iron or steel; threaded wood screws other than coach screws</a>"]
B --> F["<a href='/classifications/hs/v2017/731814'>731814: Iron or steel; threaded self-tapping screws</a>"]
B --> G["<a href='/classifications/hs/v2017/731815'>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 --> H["<a href='/classifications/hs/v2017/731816'>731816: Iron or steel; threaded nuts</a>"]
B --> I["<a href='/classifications/hs/v2017/731819'>731819: Iron or steel; threaded screws, bolts and nuts n.e.c. in item no. 7318.1</a>"]
B --> J["<a href='/classifications/hs/v2017/731821'>731821: Iron or steel; non-threaded spring washers and other lock washers</a>"]
B --> K["<a href='/classifications/hs/v2017/731822'>731822: Iron or steel; non-threaded washers, excluding spring and lock</a>"]
B --> L["<a href='/classifications/hs/v2017/731823'>731823: Iron or steel; non-threaded rivets</a>"]
B --> M["<a href='/classifications/hs/v2017/731824'>731824: Iron or steel; non-threaded cotters and cotter-pins</a>"]
B --> N["<a href='/classifications/hs/v2017/731829'>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
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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