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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
Radio frequency connectorsPart 24: Sectional specification-radio frequency coaxial connectors with screw coupling, typically for use in 75 cable networks (type F)
Standard published on 17.12.2013
Selected format:Radio frequency connectors—Part 29: Sectional specification for miniature radio frequency coaxial connector(type 1.0/2.3)with screw, snap-on, push-pull or quick-lock,slide-in rack and panel applicationsmechanism with characteristic impedance 50 for 50 and 75 applications
Standard published on 31.12.2015
Selected format:Radio-frequency connectors--Part 33:Sectional specification for series BMA r.f.connectors
Standard published on 5.11.2001
Selected format:Radio-frequency connectors—Part 35: Sectional specification for 2.92 series R.F connectors
Standard published on 9.3.2021
Selected format:Radio-frequency connectors - Part 36: Microminiature r.f. coaxial connectors with snap-on coupling - Characteristic impedance 50 Ohms (Type MCX)
Standard published on 21.4.2006
Selected format:Radio-frequency connectors—Part 37: Sectional specification for STWX8 series R.F. coaxial connectors
Standard published on 2.6.2015
Selected format:Radio-frequency connectors—Part 38: Sectional specification for 50 model,slide-in radio frequency coaxial connectors (type TMA) for rack and panel applications
Standard published on 7.6.2018
Selected format:Radio frequency connectors—Part 39:Sectional specification for CQM series quick lock RF connectors
Standard published on 15.3.2018
Selected format:Radio-frequency connecters. - Part 4: R.F.coaxial connectors with inner diameter of outer conductor 16mm(0.63in) with screw lock - Characteristic impedance 50 ohms (Type 7-16)
Standard published on 29.6.2007
Selected format:Radio-frequency connectors—Part 40: Sectional specification for 2.4 series R.F. connectors
Standard published on 9.3.2021
Selected format:Latest update: 2026-07-26 (Number of items: 2 290 396)
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