This part of GB/T 12618 stipulates that the diameter of the nail body is d=3mm~4.8mm, the material of the nail body is copper (Cu), the material of the nail core is steel (St) or bronze (Br) or stainless steel (SSt), and the performance level is Mechanical properties and application data of open-type button-head blind rivets in classes 20, 21 and 22.
2006GB/T 12618.1-2006 Open end blind rivets with break pull mandrel and protruding head.Property class 10,11
1990GB/T 12618-1990 Mushroom head break mandrel blind rivets
GB/T 12618.5-2006 Open end blind rivets with break pull mandrel and protruding head.Property class 20,21,22 has been changed from GB/T 12618-1990 Mushroom head break mandrel blind rivets.