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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
PhotographyPhotographic materialsDetermination of ISO resolving power
Standard published on 23.1.2006
Selected format:Dimensionshapeweight and tolerance for cold-drawn roundsquare and hexagonal steels
Standard published on 22.12.1994
Selected format:Natural gasoline
Standard published on 27.11.2013
Selected format:Metal ruler
Standard published on 10.2.2004
Selected format:Odd fluted micrometer
Standard published on 25.4.2024
Selected format:Metal-cutting machine tools—General specifications
Standard published on 5.10.2025
Selected format:Side and face milling cutters with double alternate helical teeth with carbide tips
Standard published on 30.12.2006
Selected format:Hydraulic hose fittings—Part 1: Hose fittings with O-ring face seal ends
Standard published on 31.12.2015
Selected format:Connections for hydraulic fluid power—Hose fittings—Part 2: 24°cone connectors
Standard published on 28.3.2025
Selected format:Connections for hydraulic fluid power—Hose fittings—Part 3: Flange ends
Standard published on 2.6.2020
Selected format:Latest update: 2026-06-15 (Number of items: 2 282 497)
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