This standard specifies countersunk head countersunk hole dimensions for countersunk head screws, countersunk head screws, countersunk head self-tapping screws, countersunk head self-tapping screws, countersunk head wood screws and countersunk head wood screws.
GB/T 152.2-1988 history
2014GB/T 152.2-2014 Fasteners.Countersinks for countersunk head screws
1988GB/T 152.2-1988 Fasteners--Countersinks for countersunk head serews