BS EN 2880-2018 pdf free download.Aerospace series – Nuts, anchor, self-locking, fuel resistant, sealing, floating, two lug, with counterbore, in alloy steel, cadmium plated, MoS2 lubricated – Classification: 900 MPa (at ambient temperature) / 120 °C
This European standard specifies the characteristics of self-locking, fuel resistant, sealing, floating, two lug anchor nuts, with counterbore, in alloy steel, cadmium plated, MoS 2 lubricated.
Classification: 900 MPa 1) /120 °C 2) .
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 — Cadmium plating of steels with specified tensile strength ≤ 1 450 MPa,copper, copper alloys and nickel alloys 3)
EN 2424, Aerospace series — Marking of aerospace products
EN 2491, Aerospace series — Molybdenum disulphide dry lubricants — Coating methods
EN 9100, Quality Management Systems — Requirements for Aviation, Space and Defence Organizations
EN 9133, Aerospace series — Quality Management Systems — Qualification Procedure for Aerospace Standard Products
ISO 5855-2, Aerospace — MJ threads – Part 2: Limit dimensions for bolts and nuts
ISO 5858, Aerospace — Nuts, self-locking, with maximum operating temperature less than or equal to 425 °C — Procurement specification
ISO 8788, Aerospace — Nuts, metric — Tolerances of form and position
ISO 8940, Aerospace — Nuts, anchor, self-locking, sealing, floating, two-lug, with counterbore, with MJ threads, classifications: 900 MPa (at ambient temperature)/120 °C, 900 MPa (at ambient temperature)/175 °C and 900 MPa (at ambient temperature)/235 °C — Dimensions
MIL-R-6855E, Rubber, Synthetic, Sheets, Strips, Molded or Extruded Shapes, General Specification for 4)
TR 3791, Aerospace series — Materials for self-locking nuts, threaded inserts and screw thread inserts of temperature classes ≤ 425 °C 5)
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 MoS 2 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 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.
Nut element:
— 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;
— EN 2491, thickness not specified, mandatory on threads, optional on other surfaces.BS EN 2880 pdf download.