General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest
GB/T 97.5-2002
Replace
GB/T 9074.29-1988GB/T 9074.30-1988
Scope
This standard stipulates that for self-tapping screw and flat washer assembly (in accordance with GB/T 9074.18), the nominal size (thread diameter) is 2.2 ~ 9.5mm, the standard series and large series, the hardness level is 180HV, and the product level is Grade A flat washers.
GB/T 97.5-2002 history
2002GB/T 97.5-2002 Plain washers for tapping sew and washer assemblies