ISO 13589 pdf download.Aerospace — Nuts, bihexagonal, self-locking, with counterbore and MJ threads, classifications
1 Scope
This International Standard specifies the dimensions of bihexagonal nuts with counterbore and MJ threads and a self-locking feature achieved by forming the upper portion out-of-round, for classifications: 1 1 00 MPa 1 ) /425 °C 2) , 1 1 00 MPa 1 ) /650 °C 2) , 1 21 0 MPa 1 ) /425 °C 2) , 1 21 0 MPa 1 ) /730 °C 2) , 1 550 MPa 1 ) /235 °C 2) , 1 550 MPa 1 ) /425 °C 2) and 1 550 MPa 1 ) /600 °C 2) . This International Standard is only applicable for the compilation of aerospace product standards.
2 Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 4095:1 998, Aerospace — Bi-hexagonal drives — Wrenching configuration — Metric series . ISO 5855-2:1 988, Aerospace — MJ threads — Part 2: Limit dimensions for bolts and nuts . ISO 5858:1 991 , Aerospace — Self-locking nuts with maximum operating temperature less than or equal to 425 °C — Procurement specification . ISO 8641 :1 987, Aerospace — Self-locking nuts with maximum operating temperature greater than 425 °C — Procurement specification . ISO 8788:1 987, Aerospace — Fasteners — Tolerances of form and position for nuts .
3 Configuration and dimensions
See figure 1 and table 1 . Dimensions and tolerances are expressed in millimetres. They apply after any surface coating(s) but before the application of any lubricant.
NOTE — Tolerances of form and position shall be in conformity with those specified in ISO 8788. Details of form not stated are at the manufacturer’s discretion. 1 ) These values, in micrometres, apply before any surface coating(s) is (are) applied. The values do not apply to threads the surface texture of which will be as achieved by the usual manufacturing methods. 2) All forms of entry (radius or chamfer) permissible within these limiting dimensions.