This standard contains dimensional of counterbored diameters for hexagon socket head cap screws and screws with cheese head or pan head.
DIN 974-1:1991 history
2008DIN 974-1:2008-02 Diameters of counterbores - Manufacturing dimensions - Part 1: Hexagon socket head cap screws and screws with cheese head or pan head
2008DIN 974-1:2008 Diameters of counterbores - Manufacturing dimensions - Part 1: Hexagon socket head cap screws and screws with cheese head or pan head
1991DIN 974-1:1991 Diameters of counterbores for hexagon socket head cap screws and screws with cheese head or pan head; manufacturing dimensions