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 heads the compatibility shall be checked.
BS EN 2122:1996 history
0000 BS EN 2122:1996(1999)
1996BS EN 2122:1996 Washers, flat, in aluminium alloy, anodized or chromated