BS A 317:1997
Nuts, hexagonal, plain, normal height, normal across flats, with MJ threads, classifications - 600 MPa (at ambient temperature)/120 °C, 600 MPa (at ambient temperature)/235 °C, 900 MPa (at ambient temperature)/425 °C, 1100 MPa (at ambient temperature)/235

Standard No.

BS A 317:1997

Release Date

1997

Published By

British Standards Institution (BSI)

Status

Be replaced 2008-09

Replace By

BS ISO 8279:2008

Latest

BS ISO 8279:2008

Scope

This International Standard specifies the dimensions of plain, hexagonal nuts, normal height, normal across flats, with MJ threads, of classifications: 600 MPa /120℃ , 600 MPa /235 ℃ , 900 MPa/ 425 ℃ . 1 100 MPa /235 ℃ , 1 100 MPa /315 ℃ , 1 100 MPa /650 ℃ , 1 210 MPa /730 ℃ , 1 250 MPa /235 ℃ and 1 550 MPa /600 ℃ . 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.

BS A 317:1997 history

• 2008 BS ISO 8279:2008 Aerospace - Nuts, hexagonal, plain, normal height, normal across flats, with MJ threads, classifications: 600 MPa (at ambient temperature)/120 °C, 600 MPa (at ambient temperature)/235 °C, 900 MPa (at ambient temperature)/425 °C, 1100 MPa (at ambient tempe
• 1997 BS A 317:1997 Nuts, hexagonal, plain, normal height, normal across flats, with MJ threads, classifications - 600 MPa (at ambient temperature)/120 °C, 600 MPa (at ambient temperature)/235 °C, 900 MPa (at ambient temperature)/425 °C, 1100 MPa (at ambient temperature)/235