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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
Tool shanks with 724 taper for automatic tool changers—Shanks Nos.40,45 and 50—Part 2:Technical specifications
WITHDRAWN published on 30.12.2006
Selected format:Tool shanks with 724 taper for automatic tool changers--Retention knobs for shanks No. 4045 and 50
WITHDRAWN published on 31.3.1989
Selected format:Tool shanks with 724 taper for automatic tool changers—Retention knobs for shanks Nos.40,45 and 50—Part 1:Dimensions and mechanical characteristics
WITHDRAWN published on 30.12.2006
Selected format:Tool shanks with 724 taper for automatic tool changers—Retention knobs for shanks Nos.40,45 and 50—Part 2:Technical specifications
WITHDRAWN published on 30.12.2006
Selected format:Taper shank twist drills with carbide tips
WITHDRAWN published on 31.3.1989
Selected format:General technical specifications for twist drill with carbide tips
WITHDRAWN published on 31.3.1989
Selected format:Parallel shank T-slot cutters with carbide tips
WITHDRAWN published on 31.3.1989
Selected format:Taper shank T-slot cutters with carbide tips
WITHDRAWN published on 31.3.1989
Selected format:Parallel keys--Dimensions of cross sections and keyways
WITHDRAWN published on 23.6.1979
Selected format:Oblique teeth parallel shank end mills with carbide tips
WITHDRAWN published on 1.1.1989
Selected format:Latest update: 2026-01-28 (Number of items: 2 257 539)
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