Iron or steel; threaded screw hooks and screw rings

HS v2022 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 home improvement and logistics. They play a crucial role in securely attaching, suspending, or supporting various objects and structures, contributing to the overall efficiency and safety of diverse applications.

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 durability and corrosion resistance.

Production inputs

The primary inputs for the production of HS code 731813 items include iron or steel raw materials, as well as specialized machinery and tools for the shaping, threading, and finishing processes. Manufacturers may also require various lubricants, coolants, and protective coatings to ensure the quality and performance of the final products. Additionally, skilled labor, energy sources, and efficient supply chain management are essential for the smooth operation of this industry.

Production outputs

The primary outputs of HS code 731813 are threaded screw hooks and screw rings made of iron or steel. These fasteners are widely used in a variety of applications, including 732690 Other articles of iron or steel, 732510 Cast articles of iron or steel, and 732619 Other cast articles of iron or steel. The threaded design of these products allows for secure attachment and easy installation, making them valuable components in construction, machinery, and various industrial settings.

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 version):

This page shows the most recent version of code 731813.

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

    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/v2022/731813'>731813: Iron or steel; threaded screw hooks and screw rings</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/v2022/731814'>731814: Iron or steel; threaded self-tapping screws</a>"]
B --> G["<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 --> H["<a href='/classifications/hs/v2022/731816'>731816: Iron or steel; threaded nuts</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

    classDef level1 color:#000,fill:#a8f9ff,stroke:#333,stroke-width:2px
    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
    classDef level5 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef level6 color:#000,fill:#f1c40f,stroke:#333,stroke-width:1px
    classDef highlight color:#000,fill:#fff,stroke:#000,stroke-width:5px



  %% Apply classes
  class A level2
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