ISO 5858:1999 pdf download – Aerospace – Nuts, self-locking, with maximum operating temperature less than or equal to 425 °C – Procurement specification
1 Scope
This International Standard specifies the required characteristics for metric self-locking nuts, with MJ threads, for use in aerospace construction at a maximum temperature less than or equal to 425 °C. It is applicable to nuts as defined above, provided that reference is made to this International Standard in the relevant definition document.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards.
ISO 691 :1 997, Assembly tools for screws and nuts — Wrench and socket openings — Tolerances for general use.
ISO 1 463:1 982, Metallic and oxide coatings — Measurement of coating thickness — Microscopical method .
ISO 2859-1 :1 999, Sampling procedures for inspection by attributes — Part 1 : Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection .
ISO 3452:1 984, Non-destructive testing — Penetrant inspection — General principles .
ISO 3887:1 976, Steel, non-alloy and low-alloy — Determination of depth of decarburization .
ISO 4288:1 996, Geometrical Product Specifications (GPS) — Surface texture: Profile method — Rules and procedures for the assessment of surface texture .
ISO 5855-2:1 999, Aerospace — MJ threads — Part 2: Limit dimensions for bolts and nuts .
ISO 7403:1 998, Aerospace — Spline drives — Wrenching configuration — Metric series.
ISO 7481 :— 1 ) , Aerospace — Self-locking nuts with maximum operating temperature less than or equal to 425 °C —Test methods.
ISO 7870:1 993, Control charts — General guide and introduction.
ISO 7966:1 993, Acceptance control charts.
ISO 8258:1 991 , Shewhart control charts.
ISO 8788:— 2) , Aerospace — Nuts, metric — Tolerances of form and position.
ISO 9002:1 994, Quality systems — Model for quality assurance in production, installation and servicing .
ISO 9227:1 990, Corrosion tests in artificial atmospheres — Salt spray tests .
ISO/TR 1 3425:1 995, Guide for the selection of statistical methods in standardization and specification.
3 Terms and definitions
For the purposes of this International Standard, the following terms and definitions apply.
3.8 critical defect
defect that, according to judgement and experience, is likely to result in hazardous or unsafe conditions for individuals using, maintaining, or depending upon the considered product, or that is likely to prevent performance of the function of a major end item
3.9 major defect
defect, other than critical, that is likely to result in a failure or to reduce materially the usability of the considered product for its intended purpose
3.10 minor defect
defect that is not likely to reduce materially the usability of the considered product for its intended purpose, or that is a departure from established specifications having little bearing on the effective use or operation of this product
3.11 sampling plan
plan according to which one or more samples are taken in order to obtain information and possibly reach a decision
NOTE For the purposes of this International Standard, each sampling plan specifies the number of nuts to be inspected as a function of the size of the batch and the acceptance number [number of defective items acceptable (Ac)] .
3.12 simple random sampling
sampling of n items from a population of N items in such a way that all possible combinations of n items have the same probability of being chosen