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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
Countersunk flat head screws--Part 2:Penetration depth of cross recesses
Standard published on 5.8.1997
Selected format:Rubbervulcanized or thermoplastic - Determination of tensile stress-strain properties
Standard published on 24.4.2009
Selected format:Tapping screws thread
Standard published on 5.12.2002
Selected format:Hexagon socket head shoulder screws
Standard published on 1.8.1985
Selected format:Slotted pan head tapping screws
Standard published on 12.7.2017
Selected format:Slotted countersunk (flat) head tapping screws
Standard published on 12.7.2017
Selected format:Slotted raised countersunk (oval) head tapping screws
Standard published on 12.7.2017
Selected format:Hexagon head tapping screws
Standard published on 12.7.2017
Selected format:Plain washers for boltsscrews and nuts--General plan
Standard published on 17.12.2001
Selected format:Extra large series--Product grade C
Standard published on 5.12.2002
Selected format:Latest update: 2026-08-14 (Number of items: 2 293 479)
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