DIN EN 4123:2018 pdf free.Aerospace series -Shank nuts, self-locking, in heat resisting nickel base alloy NI-PH2601 (Inconel 718), silver plated on thread -Classification: 1 550 MPa (at ambient temperature) / 600 °C.
3 Required characteristics
3.1 Configuration 一Dimensions – Tolerances 一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: 一thread ≥M]6: 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.values applicable before silver plating. Thread surface will be as achieved by normal methods of manufacture remove sharp edges 0,1 to 0,4 : not convex chamfer or radius 0,08 max. thread form out-of-round in this area to achieve the self-locking requirement [tooling marks permissible) pitch diameter marking in these areas but not in locking area Details of form not stated are left to the manufacturer’s discretion a Limit of the blend radius.DIN EN 4123 pdf download.