ISO 9199:1998
Aerospace - Nuts, bihexagonal, self-locking, MJ threads, classifications: 1100 MPa (at ambient temperature)/425 °C, 1100 MPa (at ambient temperature)/650 °C, 1210 MPa (at ambient temperature)/425 °C, 1210 MPa (at ambient temperature)/730 °C, 1550 MPa (at

Standard No.

ISO 9199:1998

Release Date

1998

Published By

International Organization for Standardization (ISO)

Latest

ISO 9199:1998

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: 1 100 MPa/425 ℃, 1 100MPa/650 ℃, 1 210 MPa/425 ℃, 1 210 MPa/730 ℃, 1 550 MPa/235 ℃, 1 550 MPa/425 ℃ and 1 550 MPa/600 ℃. 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 9199:1998 history

• 1998 ISO 9199:1998 Aerospace - Nuts, bihexagonal, self-locking, MJ threads, classifications: 1100 MPa (at ambient temperature)/425 °C, 1100 MPa (at ambient temperature)/650 °C, 1210 MPa (at ambient temperature)/425 °C, 1210 MPa (at ambient temperature)/730 °C, 1550 MPa (at
• 1987 ISO 9199:1987 Aerospace; Self-locking bihexagonal nuts, classifications 1 100 MPa/650 degrees C, 1 250 MPa/760 degrees C, 1 550 MPa/235 degrees C and 1 550 MPa/650 degrees C; Dimensions