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Deeply engaged in the field of metal and non-metal components, including standard parts, fasteners, assemblies, and more.
National Standard for Part Code Numbering Rules
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2026-01-06
The rules for part designation codes are not covered by a single national standard; rather, they involve multiple national and industry standards, depending on the type of part, its application area, and industry-specific regulations. Below is an overview of some common national and industry standards related to part designation codes: I. Designation Code Rules in National Standards Mandatory National Standards (GB) Code: GB Meaning: These standards have legal status and must be strictly enforced. They cover areas such as human health, personal safety, and property security. Although they do not directly address part designation codes, they provide fundamental safety and quality requirements for the design, production, and use of parts. Recommended National Standards (GB/T) Code: GB/T Meaning: These standards are not mandatory but represent advanced technologies and best practices within the industry. In terms of part designation codes, they may cover part classification, naming conventions, and other related guidelines to enhance the universality and interchangeability of parts. National Standards for Specific Fields For example, National Metrological Technical Specifications (JJF) and National Metrological Verification Procedures (JJG): While these standards primarily focus on the field of metrology, the designation codes for certain metrological components may also follow these specifications. II. Designation Code Rules in Industry Standards Industry standards are developed when there are no national standards or when unified technical requirements are needed within a specific industry. Different industries have their own unique rules for part designation codes, such as: Mechanical Industry (JB) Code: JB Meaning: Mechanical industry standards may include rules for part classification, naming, and designation coding to ensure the universality and interchangeability of mechanical parts. Automotive Industry (QC) Code: QC Meaning: Automotive industry standards provide detailed regulations for the designation codes of automotive parts, including part classification, naming, and coding rules, to meet the complexity and efficiency requirements of automobile manufacturing. Other Industries For example, the textile industry (FZ), pharmaceutical industry (YY), and electronics industry (SJ): These industries also have their own unique rules for part designation codes to meet the specific needs of their respective fields.
The rules for part designation codes are not covered by a single national standard; rather, they involve multiple national and industry standards, depending on the type of part, its application area, and industry-specific regulations. Below is an overview of some common national and industry standards related to part designation codes:
I. Code Rules in National Standards
Mandatory National Standard (GB)
Codename: GB
Meaning: These standards have legal implications and must be strictly enforced. They cover areas such as human health, personal safety, and property security. Although they do not directly address part numbering, they provide the fundamental safety and quality requirements for the design, manufacture, and use of parts.
Recommended National Standard (GB/T)
Code name: GB/T
Meaning: These standards are not mandatory, but they represent the industry’s advanced technologies and best practices. In terms of part coding and numbering, they may involve part classification, naming conventions, and other related aspects, thereby enhancing the parts’ versatility and interchangeability.
National standards for specific fields
Such as the National Metrological Technical Specifications (JJF) and the National Metrological Verification Procedures (JJG): These standards primarily pertain to the field of metrology, but the code numbers assigned to certain metrological components may also follow these specifications.
II. Code Rules in Industry Standards
Industry standards are developed when there is no national standard or when uniform technical requirements need to be established within a specific industry. Different industries have their own unique part designation and numbering systems; for example:
Mechanical Industry (JB)
Codename: JB
Meaning: Mechanical industry standards may include rules for the classification, naming, and code numbering of parts, ensuring the universality and interchangeability of mechanical components.
Automotive Industry (QC)
Codename: QC
Meaning: Automotive industry standards provide detailed specifications for the coding and numbering of automotive parts, including part classification, naming conventions, and coding rules, to accommodate the complexity and efficiency of automobile production.
Other industries
Such as textiles (FZ), pharmaceuticals (YY), and electronics (SJ): These industries also have their own unique part coding rules tailored to the specific needs of their respective fields.
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