BS/EN 4297-2017 pdf download.Aerospace series Nuts, hexagon, self-locking by plastic ring, normal height, normal across flats, in corrosion resisting steel, passivated Classification: 900 MPa (at ambient temperature) / 120 °C.
This BS/EN 4297 specifies the characteristics of hexagonal nuts, self-locking by plastic ring, normal height, normal across flats, in corrosion resisting steel, passivated.
Classification: 900 MPa 1) /120 °C 2)
2 Normative references
The following documents, in whole or In part, are normatively referenced In this document and are indispensable for its application. 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 2516, Aerospace series — Passivation of corrosion resisting steels and decontamination of nickel base alloys
EN 9100, Quality Management Systems – Requirements for Aviation, Space and Defense Organizations
EN 9133,Aerospace series Quality management systems – Qualification procedure for aerospace standard parts
ISO 5855-2, Aerospace — MJ threads — Part 2: Limit dimensions for bolts and nuts
ISO 5858, Aerospace — Nuts, self-locking, with maximumn operating temperature less than or equal to 425 degrees C — Procurement specification
ISO 8788, Aerospace — Nuts, metric — Tolerances ofform and position
3 Required characteristics
3.1 Configuration – Dimensions – Masses
See Figure 1 and Table 1.
Dimensions and tolerances are expressed in millimetres and apply alter surtace treatment.
Details of form not stated are at the manufacturer’s option.
3.2 Tolerances of form and position
Iso 8788.
1) Corresponds to the minimum tensile stress which the nut is able to withstand at ambient temperature without breaking or cracking when tested with a bolt of a higher strength class.
2) Maximum temperature that the nut is able to withstand, without permanent alteration to Its original characteristics, after ambient temperature has been restored. The maximum temperature is conditioned by the plastic ring.
3.3 Materials
Threaded element: FE-PA18O1.
Plastic ring: polyamide 6.6.
3.4 Surface treatment
EN 2516. process class appropriate to the material
5 Marking
EN 2424. style N. See Figure 1.
6 Technical specification
ISO 5858, except for:
— Approval of manufacturers: see EN 9100;
— Qualification of products: see EN 9133.BS/EN 4297-2017 pdf download.