GB/T 5653-2008 Flared couplings—Specification

GB/T 5653-1985 Specification for flared type tube fittings

GB/T 3765-2008 24°cone connectors—Specification GB/T 193-2003 General purpose metric screw threads—General plan GB/T 197-2003 General purpose metric screw threads—Tolerances GB/T 197-2018 General purpose metric screw threads—Tolerances GB/T 699-1999 Quality carbon structural steels GB/T 699-2015 Quality carbon structure steels GB/T 1527-1997 Drawn tube of copper and copper alloys GB/T 1527-2006 Drawn tube of copper and copper alloys GB/T 1527-2017 Drawn tube of copper and copper alloys GB/T 1528-1997 Extruded tube of copper and copper alloys GB/T 3103.1-2002 Tolerances for fasteners—Bolts, screws, studs and nuts GB/T 3141-1994 Industrial liquid lubricants—ISO viscosity classification GB/T 3452.2-1987 Appearance quality acceptance criteria for rubber O-rings GB/T 3452.2-2007 Fluid power systems—O-rings—Part 2:Quality acceptance criteria GB/T 3639-2000 Cold-drawn or cold-rolled precision seamless steel tubes GB/T 3639-2009 Seamless cold-drawn or cold-rolled steel tubes for precision applications GB/T 3639-2021 Seamless cold-drawn or cold-rolled steel tubes for precision applications GB/T 6031-1998 Rubber,vulcanized or thermoplastic—Determination of hardness (hardness between 10 IRHD and 100IRHD) GB/T 6031-2017 Rubber,vulcanized or thermoplastic—Determination of hardness(hardness between 10 IRHD and 100 IRHD) GB/T 7306.1-2000 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads—Part 1:Parallel internal and taper external threads GB/T 7306.2-2000 Pipe threads with 55 degree thread angle where pressure-tight joints are made on the threads—Part 2:Taper internal and external threads GB/T 7307-2001 Pipe threads with 55 degree thread angle where pressure-tight joints are not made on the threads GB/T 12716-2002 Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on the threads GB/T 12716-2011 Pipe threads with the thread angle of 60 degrees where pressure-tight joints are made on threads GB/T 17446-1998 Fluid power systems and components—Vocabulary GB/T 17446-2012 Fluid power systems and components—Vocabulary GB/T 17446-2024 Fluid power systems and components—Vocabulary GB/T 3-1997 Run-outs，undercuts and chamfers forgeneral purpose metric screw threads