Technical specifications for compression springs

　　GB/T 1239.2-1989 Technical Conditions for Cold Rolled Cylindrical Helical Compression Springs Pogopin

　　GB/T 1239.3-1989 Technical Conditions for Cold Rolled Cylindrical Spiral Torsion Springs Pogopin

　　GB/T 1239.4-1989 Technical Conditions for Hot Rolled Cylindrical Spiral Springs

　　GB/T 1239.6-1992 Design and Calculation of Cylindrical Helical Spring Pogopin

　　GB/T 1973.1-2005 Technical Conditions for Small Cylindrical Spiral Springs Pogopin

　　GB/T 1973.2-2005 Dimensions and parameters of pogopins for small cylindrical spiral tension springs

　　GB/T 1973.3-2005 Dimensions and parameters of pogopins for small cylindrical spiral compression springs

　　GB/T 2087-2001 Dimensions and Parameters of Cylindrical Spiral Stretch Springs (Half Round Hook Ring Type)

　　GB/T 2088-1997 Dimensions and Parameters of Cylindrical Spiral Stretch Springs (Circular Hook Ring Pressure Center Type)

　　GB/T 2089-2009 Cylindrical Helical Compression Springs - Pogopin (Both Ends Tightly Ground or Forged Flat) - Dimensions and Parameters

　　GB/T 4142-2001 Dimensions and Parameters of Cylindrical Spiral Stretch Springs (Circular Hook Ring Type)

　　GB/T 2785-1988 Technical Conditions for Valve Springs of Internal Combustion Engines

　　GB/T 2940-2005 Technical Conditions for Fuel Injection Pumps, Governors, and Fuel Injection Spring Pogopins for Diesel Engines

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