This standard specifies the minimum requirements applicable to internally locked nuts, with metric is M thread, whose braking is independent of the pressure on the bearing face and whose maximum operating temperature is less than or equal to 425 oC.
NF L22-500:2014 Referenced Document
EN 2133 Aerospace series - Cadmium plating of steels with specified tensile strength ≤ 1450 MPa, copper, copper alloys and nickel alloys*， 2020-11-30 Update
EN 2491 Aerospace series - Molybdenum disulphide dry lubricants - Coating methods
EN 2786 Aerospace series - Electrolytic silver plating of fasteners
ISO 1463 Metallic and oxide coatings — Measurement of coating thickness — Microscopical method*， 2021-05-11 Update
ISO 2859-1 Sampling procedures for inspection by attributes - Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection; Technical Corrigendum 1
ISO 3452-1 Non-destructive testing - Penetrant testing - Part 1: General principles*， 2021-04-30 Update
ISO 3497 Metallic coatings - Measurement of coating thickness - X-ray spectrometric methods
ISO 3887 Steels — Determination of the depth of decarburization*， 2023-08-01 Update
ISO 4288 Geometrical Product Specifications (GPS) - Surface texture: Profile method - Rules and procedures for the assessment of surface texture; Technical Corrigendum 1
ISO 7481 Aerospace — Nuts, self-locking, with maximum operating temperature less than or equal to 425 °C — Test methods*， 2023-10-01 Update
ISO 9227 Corrosion tests in artificial atmospheres — Salt spray tests — Amendment 1: Footnote of Warning*， 2024-02-19 Update
ISO 9934-1 Non-destructive testing - Magnetic particle testing - Part 1: General principles*， 2016-11-30 Update
NF L22-500:2014 history
2014NF L22-500:2014 Fasteners - Nuts, self-locking, with maximum operating temperature less than or equal to 425 oC - Technical requirements
2001NF L22-500:2001 Fasteners - Nuts, self-locking, with maximum operating temperature less than or equal to 425 o - Technical requirements.