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Mechanical Properties of Fasteners-Nuts-Coarse Thread 1 Scope The standard specifies the mechanial property (performance) of nuts with specified proof load in the test under the environmental temerature 10-35℃. It shall be noted by users that“the products, which meet requirements of the standard under the environmental temperature, may have different mechanical/physical properties under hinger or lower teperature”. Nuts that the standard is applicable to : Nominal diameter of screw threads D<39mm; General purpose screw threads complying with GB/T 192; Coarse thread diameter and pitch combination complying with GB/T 193; Basic size complying with GB/T 196; Tolerance and coordination complying with GB/T 197; Products with special mechancal requirements.
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