DIN EN 4122:2018 pdf free.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.
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 — Heat resisting steel FE-PA2601 (X4N1CrTiMoV26-15) — Rm ≥ 900 MPa — Bars for forged bolts — D ≤ 25 mm
EN 2424, Aerospace series — Marking of aerospace products
EN 2786, Aerospace series — Electrolytic silver plating offasteners
EN 3004, Aerospace series — Nuts, self-locking, MJ threads, in heat resisting steel FE-PA2601 (A286) — Classification: 1100 MPa (at ambient temperature) / 650 °C — Technical specification
EN 3639, Aerospace series — Heat resisting alloy FE-PA2601 — Softened and cold worked — Wire for forged fasteners D ≤15 mm — 900 MPa ≤Rm ≤ l 100 MPO3
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 Materials EN 2399 or EN 3639.
3.3 Surface treatment EN 2786 on thread and chamfers. Thickness: thread≥MJ6: 5 μm min. on thread flanks;thread M]5: shall show complete coverage, without thickness requirement.Coating may extend to counterbore and chamfers at manufacturer’s option, without thickness requirement.NOTE If necessary, the code 19005 shall be placed between the description block and the identity block.
5 Marking EN 2424, style A, as indicated on Figure 1.
6 Technical specification EN 3004.DIN EN 4122 pdf download.