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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
Tapping screws thread
WITHDRAWN published on 1.8.1985
Selected format:Slotted pan head tapping screws
WITHDRAWN published on 1.8.1985
Selected format:Slotted countersunk head tapping screws
WITHDRAWN published on 1.8.1985
Selected format:Slotted raised countersunk head tapping screws
WITHDRAWN published on 1.8.1985
Selected format:Hexagon head tapping screws
WITHDRAWN published on 1.8.1985
Selected format:Plain washers for bolts, screws and nuts--General plan
WITHDRAWN published on 1.1.1985
Selected format:Plain washers--Extra large series--Product grade C
WITHDRAWN published on 1.8.1985
Selected format:Slideways grinding machines with two columns—Testing of the accuracy
WITHDRAWN published on 1.8.1985
Selected format:-
WITHDRAWN published on 1.1.1985
Selected format:Test conditions for boring and milling machines with horizontal spindle—Testing of the accuracy—Part 2:Table—type machines
WITHDRAWN published on 18.2.2000
Selected format:Latest update: 2026-06-11 (Number of items: 2 281 927)
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