ISO 8538:1999
Aerospace - Nuts, hexagonal, self-locking, with counterbore and captive washer, with MJ threads, classifications: 1100 MPa (at ambient temperature)/235 °C, 1100 MPa (at ambient temperature)/315 °C and 1100 MPa (at ambient temperature)/425 °C - Dimensions

Standard No.

ISO 8538:1999

Release Date

1999

Published By

International Organization for Standardization (ISO)

Latest

ISO 8538:1999

Scope

This International Standard specifies the dimensions of self-locking hexagonal nuts, with counterbore and captive washer, with MJ threads, of classifications: 1 100 MPa/235 ℃, 1 100 MPa/315 ℃ 1 100 MPa/425 ℃. 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 8538:1999 history

• 1999 ISO 8538:1999 Aerospace - Nuts, hexagonal, self-locking, with counterbore and captive washer, with MJ threads, classifications: 1100 MPa (at ambient temperature)/235 °C, 1100 MPa (at ambient temperature)/315 °C and 1100 MPa (at ambient temperature)/425 °C - Dimensions
• 1986 ISO 8538:1986 Aerospace; Self-locking hexagon nuts with counterbore and captive washer, classification 1 100 MPa/235 degrees C