ISO 12268:1997
Aerospace - Nuts, hexagonal, plain, reduced height, reduced across flats, with MJ threads; classifications: 450 MPa (at ambient temperature)/425 °C, 600 MPa (at ambient temperature)/235 °C, 600 MPa (at ambient temperature)/315 °C, 600 MPa (at ambient temp

Standard No.

ISO 12268:1997

Release Date

1997

Published By

International Organization for Standardization (ISO)

Latest

ISO 12268:1997

Scope

This International Standard specifies the dimensions of plain, hexagonal nuts, reduced height, reduced across flats, with MJ threads, of classifications: 450 MPa/425 C, 600 MPa/235 C, 600 MPa/315 C, 600 MPa/650 C, 900 MPa/235 C, 900 MPa/730 C and 1 100 MPa/600 C. 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. note: 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.

ISO 12268:1997 history

• 1997 ISO 12268:1997 Aerospace - Nuts, hexagonal, plain, reduced height, reduced across flats, with MJ threads; classifications: 450 MPa (at ambient temperature)/425 °C, 600 MPa (at ambient temperature)/235 °C, 600 MPa (at ambient temperature)/315 °C, 600 MPa (at ambient temp