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ISO 12268:1997
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ISO 12268:1997 Aerospace - Nuts, hexagonal, plain, reduced height, reduced across flats, with MJ threads, classifications: 450 MPa (at ambient temperature)/425 degrees C, 600 MPa (at ambient temperature)/235 degrees C, 600 MPa (at ambient temperature)/315 degrees C, 600 MPa (at ambient temperature)/650 degrees C,
standard by International Organization for Standardization, 08/01/1997
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Full Description
This International Standard specifies the dimensions of plain, hexagonal nuts, reduced height, reduced across flats. with MJ threads, of classifications: 450 MPa1)/425 C2), 600 MPa1)/235 C2), 600 MPa1)315 C2), 600 MPa1)650 C2), 900 MPa1)235 C2), 900 MPa1)730 C2) and 1100 MPa1)/GOO C2).
Nuts provided with holes are intended to be used with lockwire in conformity with ISO 245.
This International Standard is only applicable for the compilation of aerospace product standards.
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 material or by the surface treatment.