BS EN 4122:2018 pdf download

BS EN 4122:2018 pdf download.Aerospace series – Shank nuts, self-locking, in heat resisting steel FE-PA2601 (A286), silver plated on thread – Classification: 1 100 MPa (at ambient temperature) / 650 °C
1 Scope
This document specifies the characteristics of self-locking shank nuts in FE-PA2601, silver plated on thread, for aerospace applications.
Classification: 1 100 MPa1 / 650 °C2.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 2399, Aerospace series一Heat resisting steel FE-PA2601 (X4NiCrTiMoV26-15)一Rm≥900 MPa一Bars for forged bolts一D≤25 mm
EN 2424, Aerospace series一Marking of aerospace products
EN 2786, Aerospace series一Electrolytic silver plating offasteners
EN 3004, Aerospace series一Nuts, self-locking, MJ threads, in heat resisting steel FE-PA2601 (A286)一Classification: 1 100 MPa (at ambient temperature)/ 650 °C一Technical specification
EN 3639, Aerospace series一Heat resisting alloy FE-PA2601 – – Softened and cold worked一Wire for forged fastenersD≤15 mm一900 MPa S Rm S1100 MPa3
ISO 5855-2, Aerospace一M] threads一Part 2: Limit dimensions for bolts and nuts
3 Required characteristics
3.1 Configuration 一- Dimensions一Tolerances – Masses
See Figure 1 and Table 1.
Dimensions and tolerances are in millimetres. They apply after silver plating for thread surface.
3.2 Materials
EN 2399 or EN 3639.
3.3 Surface treatment
EN 2786 on thread and chamfers.
Thickness:
一thread ≥MJ6: 5 um min. on thread flanks;