GB/T 99-1986
Slotted round head wood screws
GB/T 100-1986
Slotted countersunk head wood screws
GB/T 101-1986
Slotted rasied countersunk head wood screws
GB/T 102-1986
Hexagon wood screws
GB/T 950-1986
Cross recessed round head wood screws
GB/T 951-1986
Cross recessed countersunk head wood screws
GB/T 952-1986
Cross recessed raised countersunk head wood screws
GB/T 5282-1985
Slotted pan head tapping screws-type C
GB/T 5282-1985
Slotted pan head tapping screws-type F
GB/T 16824.1-2016
Hexagon washer head tapping screws—Type R
GB/T 5283-1985
Slotted countersunk head tapping screws-type C
GB/T 5283-1985
Slotted countersunk head tapping screws-type F
GB/T 5284-1985
Slotted raised countersunk head tapping screws-type C
GB/T 5284-1985
Slotted raised countersunk head tapping screws-type F
GB/T 5285-1985
Hexagon head tapping screws-type C
GB/T 5285-1985
Hexagon head tapping screws-type F
GB/T 16824.1-2016
Hexagon washer head tapping screws—Type F
GB/T 16824.2-2016
Hexagon flange head tapping screws —Type R
GB/T 16824.2-2016
Hexagon flange head tapping screws —Type F
GB/T 9456-1988
Cross recessed hexagon head tapping screws with indentation-type C