This part of GB/T 152 specifies the type, size and marking of countersunk holes for countersunk head screws, half countersunk head screws, countersunk head self-tapping screws and half countersunk head self-tapping screws whose head shape conforms to GB/T 5279.
GB/T 152.2-2014 Referenced Document
GB/T 5277 Fasteners--Clearance holes for bolts and screws
GB/T 5279 Countersunk head screws--Head configuration and gauging
GB/T 152.2-2014 history
2014GB/T 152.2-2014 Fasteners.Countersinks for countersunk head screws
1988GB/T 152.2-1988 Fasteners--Countersinks for countersunk head serews