This standard specifies the characteristics of flat washers, in aluminium alloy, anodized or chromated, for maximum operating temperature 120 ℃, for aerospace applications.They are intended for use primarily underneath nuts ; for use underneath bolt headsThe compatibility shall be checked.
EN 2122:1996 history
1996EN 2122:1996 Aerospace series - Washers, flat, in aluminium alloy, anodized or chromated
1994EN 2122:1994 Aerospace Series Washers, Flat, in Aluminium Alloy, Anodized or Chromated
1989EN 2122:1989/AC:1989 Aerospace series; washers, flat aluminium alloy; amendment to EN 2122:1989