GB/T 19674.2-2005 Connections for general use and fluid power—Ports and stud ends with thread—Stud ends with elastomeric sealing(type A and type E)

GB/T 19674.1-2005 Connections for general use and fluid power—Ports and stud ends with thread—Threaded port GB/T 19674.3-2005 Connections for general use and fluid power—Ports and stud ends with thread—Stud ends with metal-to-metal sealing(type B)

GB/T 6908-1986

GB/T 193-2003 General purpose metric screw threads—General plan GB/T 196-2003 General purpose metric screw threads—Basic dimensions GB/T 197-2003 General purpose metric screw threads—Tolerances GB/T 197-2018 General purpose metric screw threads—Tolerances GB/T 230.1-2004 Metallic Rockwell hardness test—Part1:Test method(scales A、B、C、D、E、F、G、H、K、N、T) GB/T 230.1-2009 Metallic materials—Rockwell hardness test—Part 1:Test method(scales A、B、C、D、E、F、G、H、K、N、T) GB/T 230.1-2018 Metallic materials—Rockwell hardness test—Part 1:Test method GB/T 1800.4-1999 Limits and fits Tables of standard tolerance grades and limit deviations for holes and shafts 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 5568-1994 Rubber or plastics hoses and hose assemblies—Hydraulic impulse test without flexing GB/T 5568-2006 Rubber or plastics hoses and hose assemblies—Hydraulic impulse test without flexing GB/T 5568-2013 Rubber or plastics hoses and hose assemblies—Hydraulic-pressure impulse test without flexing GB/T 5568-2022 Rubber or plastics hoses and hose assemblies—Hydraulic-pressure impulse test without flexing 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 7307-2001 Pipe threads with 55 degree thread angle where pressure-tight joints are not made on the 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 196-2025 General purpose metric screw threads—Basic dimensions