1970QJ 1960.26A-2007 Multifunctional combined stamping formwork elements - Part 26: Hexagon socket head cap screws
1986QJ 959.3-1985 Multi-functional combined stamping formwork element hexagon socket head screw
QJ 959.3-1985 Multi-functional combined stamping formwork element hexagon socket head screw was changed to QJ 1960.26A-2007 Multifunctional combined stamping formwork elements - Part 26: Hexagon socket head cap screws.