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 5282-1985
Slotted pan head tapping screws-type C
GB/T 5282-1985
Slotted pan head tapping screws-type F
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 5282-2017
Slotted pan head tapping screws-type C
GB/T 5282-2017
Slotted pan head tapping screws-type F
GB/T 5283-2017
Slotted countersunk head tapping screws-type C
GB/T 5283-2017
Slotted countersunk head tapping screws-type F
GB/T 5284-2017
Slotted raised countersunk head tapping screws-type C
GB/T 5284-2017
Slotted raised countersunk head tapping screws-type F