BS/EN 4123-2018 pdf download.Aerospace series – Shank nuts, self-locking, in heat resisting nickel base alloy NI-PH2601 (Inconel 718), silver plated on thread – Classification: 1550 MPa (at ambient temperature) / 600 °C.
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 2424, Aerospace series — Marking of aerospace products
EN 2786, Aerospace series — Electrolytic silver plating offasteners
EN 2952, Aerospace series — Heat resisting alloy Nl-PH2601 — Solution treated and cold worked — Bar for forged fasteners D ≤50 mm — 1270 MPa ≤Rm ≤1 550 MPG3
EN 4047, Aerospace series — Nuts, self-locking, Mj threads, in heat resisting nickel base alloy Nl-PH260 1 (Inconel 718), silver plated — Classification: 1 550 MPa (at ambient temperature) / 600 °C — Technical specification
ISO 5855-2, Aerospace — Mj threads — Part 2: Limit dimensions for bolts and nuts
3 Required characteristics
3.1 Configuration — Dimensions — Tolerances — Masses
See Figure 1 and Table 1.
Dimensions and tolerances are in millimetres. They apply after silver plating for thread surface.
3.2 Material
EN 2952.
3.3 Surface treatment
EN 2786 on thread only.
Thickness:
— thread ≥ MJ6: 5 zm mm. on thread flanks;
— thread MJ5: shall show complete coverage, without thickness requirement.
5 Marking
EN 2424 , style A , as indicated on Figure 1 .
6 Technical specification
EN 4047.BS/EN 4123-2018 pdf download.
BS/EN 4123-2018 pdf download
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