BS EN 2880:2018 pdf download.Aerospace series – Nuts, anchor, self-locking, fuel resistant, sealing, floating, two lug
1 Scope
This European standard specifies the characteristics of self-locking, fuel resistant, sealing, floating, two lug anchor nuts, with counterbore, in alloy steel, cadmium plated, MoS2 lubricated.Classification: 900 MPa)/ 120 °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 2133, Aerospace series 一Cadmium plating of steels with specified tensile strength ≤1 450 MPa,copper, copper alloys and nickel alloys3)
EN 2424, Aerospace series一Marking of aerospace products
EN 2491, Aerospace series一Molybdenum disulphide dry lubricants一Coating methods
EN 9100, Quality Management Systems一Requirements for Aviation, Space and Defence Organizations
EN 9133, Aerospace series 一Quality Management Systems 一Qualification Procedure for Aerospace Standard Products
ISO 5855-2, Aerospace一M] threads – Part 2: Limit dimensions for bolts and nuts
ISO 5858, Aerospace一Nuts, self-locking, with maximum operating temperature less than or equal to 425 °C一Procurement specification
ISO 8788, Aerospace一Nuts, metric一Tolerances of form and position
ISO 8940, Aerospace一Nuts, anchor, selflocking, sealing, floating, two-lug, with counterbore, with M] threads,classifications: 900 MPa [at ambient
temperature)/120 °C, 900 MPa [at ambient temperature)/175 °C and 900 MPa [at ambient temperature])/235 °C一Dimensions
MIL-R-6855E, Rubber, Synthetic, Sheets, Strips, Molded or Extruded Shapes, General Specification for4) TR 3791, Aerospace series 一Materials for self-locking nuts, threaded inserts and screw thread inserts of temperature classes≤425 °Cs)
3 Required characteristics
3.1 Configuration – Dimensions – Masses
See Figure 1 and Table 1.
Dimensions and tolerances are: in conformity with ISO 8940, expressed in millimetres and apply after cadmium plating but before MoS2 lubrication.
Details of form not stated are at the manufacturer’s option.
3.2 Tolerances of form and prosition
ISO 8788.
3.3 Materials
Cage, seal retainer and nut element: TR 3791.
Sealing ring: rubber, fuel resistant per MIL-R-6855, class 1, grade 60 or equivalent.
3.4 Surface treatments
Cage and seal retainer: EN 2133, 5 um min. on all surfaces which can be contacted by a 20 mm diameter ball. On all other surfaces, a continuous deposit shall be present.
Nut element:
一EN 2133, 5 μm min. on all surfaces which can be contacted by a 20 mm diameter ball. On all other surfaces, a continuous deposit shall be present;
一EN 2491, thickness not specified, mandatory on threads, optional on other surfaces.
BS EN 2880:2018 pdf download
