EN 2139-1989 pdf download.Aerospace series Washers , flat heat resisting steel.
This EN 2139 specifies the characteristics of flat heat resisting steel washers for use in aerospace applications, at temperatures below 650 °C.
They are intended for use primarily underneath nuts, for use underneath bolt heads the compatibility shall be checked.
2 References
EN 2171. Heat resisting steel FEPA92HT — R,,. 900 .TIIPa — Bars — Aerospace series.
EN 2175, Heat resisting steel FE.PA93HT. sniut ion treated and precipitation treated — Sheets and strips a ≤ 3 ni m — Aerospace series.
EN 2424, Aerospace series — Identification marking of standard fasteners. EN 2516, Aerospace series — Passivation of corrosion resisting steels1.
3 Required characteristics
3.1 Configuration — Dimensions — Tolerances
Configuration shall correopond to the Figure, dimensioiii and tolerances shall correspond to the Figure
and Table 1.
These dimensions apply after passivation.
3.2 Surface roughness
R = 6.3 1m all over unless otherwise specified. The values apply prior to passivation.
3.3 Material
Heat resisting steel EN 2171 or EN 2175.
3.4 Surface treatment
Passivation EN 2516.EN 2139-1989 pdf download.
EN 2139-1989 pdf download
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