BS EN 4047:2004 pdf free.Nuts, self-locking, MJ threads, in heat resisting nickel basealloy NI-PH2601 (Inconel 718),silver plated —Classification:1550 MPa(at ambient temperature)/600 C —Technical specification.
BS EN 4047 This standard specifies the characteristics; qualification and acceptance requirements for self-locking nuts withMJ threads in Nl-PH2601, silver plated, for aerospace applications.
Classification: 1 550 MPa 1) / 600 °c 2) lt is applicable whenever referenced.
Normative references The following referenced documents are indispensable for the application of this document. For datedreferences，only the edition cited applies. For undated references， the latest edition of the referenceddocument (including any amendments) applies.
batch quantity of finished parts, of the same type and same diameter, produced from the same material obtainedfrom the same melt,manufactured in the course of the same production cycle，following the samemanufacturing route and having undergone all the relevant heat treatments and surface treatments.
inspection lot quantity of parts from a single production batch with the same part number which completely defines the part.
The purpose of acceptance inspections and tests is to check, as simply as possible, by a methodrepresentative of actual use conditions，with the uncertainty inherent to statistical sampling, that the nutsconstituting the batch satisfy the requirements of this standard.
Acceptance inspections and tests (requirements, methods, numbers of nuts) are specified in Table 1 ; theyshall be carried out on each production batch or inspection lot. Nuts from the batch or lot to be tested shailbe selected by simple random sampling.
Each nut may be submitted to several inspections or tests.
lf a more stringent inspection is deemed necessary, all or part of the qualification inspections and tests maybe performed during the acceptance inspection and testing. In this case, the number of nuts submitted tothese inspections and tests is the same as that submitted for qualification inspection and tests.
breakaway torque the torque required to start unscrewing the nut or bolt with respect to the associated part, with the nut lockingdevice still fully engaged on the bolt, but after the axial load in the assembly has been removed byunscrewing half a turn followed by a halt in rotational movement.BS EN 4047 pdf download.