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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
Hand reamers--Part 1:Types and dimensions
Standard published on 10.2.2004
Selected format:Hand reamers--Part 2:Technical conditions
Standard published on 10.2.2004
Selected format:Test methods for the properties of piezoelectric ceramics--Test methods for temperature characteristics of relative free dielectric constants
Standard published on 31.3.1989
Selected format:Test methods for the properties of piezoelectric ceramics--Test for Poisson’s ratio E
Standard published on 31.3.1989
Selected format:Test methods for SAW properties of piezoelectric ceramics and crystals
Standard published on 31.3.1989
Selected format:Radio-frequency connectors - Part 1: Generic specification - General requirements and measuring methods
Standard published on 12.11.2013
Selected format:Radio-frequency connectors - Part 10Sectional specification - SMB series R.F. coaxial connectors
Standard published on 31.12.2012
Selected format:Radio-frequency connectors—Part 101Sectional specification for MMCX series RF coaxial connectors
Standard published on 2.6.2015
Selected format:Radio-frequency connectors—Part 11Sectional specification for RF coaxial connectors with inner diameter of outer conductor 9.5mm (0.374in) with screw coupling with characteristic impedance 50 (type 4.1/9.5)
Standard published on 17.9.2018
Selected format:Radio-frequency connectors—Part 13:Sectional specification for type 1.6/5.6 and 1.8/5.6 RF coaxial connectors
Standard published on 17.9.2018
Selected format:Latest update: 2026-03-18 (Number of items: 2 266 854)
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