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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
Insert round nuts
Standard published on 24.6.1988
Selected format:Equipment for harvesting—Combine harvesters—Determination and designation of grain tank capacity and unloading device performance
Standard published on 23.5.2023
Selected format:Equipment for harvesting-Dimensional compatibility of forage harvesting machinery
Standard published on 24.10.2005
Selected format:Equipment for harvesting—Combine harvesters—Test procedure and performance assessment
Standard published on 30.5.2025
Selected format:Small round nuts
Standard published on 24.6.1988
Selected format:Mounting surfaces of hydraulic valves—Part 2Compensated flow-control valves
Standard published on 31.12.2021
Selected format:Mounting surfaces of hydraulic valves—Part 3: Pressure-reducing valves, sequence valves, unloading valves, throttle valves and check valves
Standard published on 31.12.2021
Selected format:Hydraulic fluid power--Pressure-relief valves--Mounting surfaces
Standard published on 17.5.2002
Selected format:Pneumatic fluid power—Single rod cylinders,bores from 8 mm to 25 mm—Mounting dimensions
Standard published on 19.11.2020
Selected format:Hydraulic fluid power--Valves--Testing method of flow control valves
Standard published on 23.7.1987
Selected format:Latest update: 2026-08-19 (Number of items: 2 298 207)
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