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BS A 318:1997 Aerospace - Nuts, hexagonal, slotted (castellated), 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 temperature)/650 °C, 900 MPa (at ambient temperature)/235 °C, 900 MPa (at ambient temperature)/730 °C and 1 100 MPa (at ambient temperature)/600 °C - Dimensions

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This International Standard specifies the dimensions of hexagon slotted (castellated) nuts, reduced height, reduced across flats, with MJ threads, of 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 temperature)/650 °C, 900 MPa (at ambient temperature)/235 °C, 900 MPa (at ambient temperature)/730 °C and 1 100 MPa (at ambient temperature)/600 °C. These nuts are intended to be used with split pins in conformity with ISO 1234. This International Standard is only applicable for the compilation of aerospace product standards.
Identifiers:
ISBN 0 580 28787 4
ICS 49.030.30 Nuts
Subject Keywords:
Diameter; Tensile stress; Threads; Dimensional tolerances; Fasteners; Aircraft components; Castellated-head fasteners; Dimensions; MJ threads
First presented to the public:
6/26/2026
Original Publication Date:
11/15/1997
Previously Published By:
British Standards Institution
Citation:
Extents:
Number of Pages - 2
License Grantor / Date Granted:
  / ( View License )
Date Deposited
2026-06-26 11:49:43.139
Submitter:
Engku Shahidil Engku Ab Rahman

All Versions

Thumbnail Name Version Created Date
BS A 318:1997 Aerospace - Nuts, hexagonal, slotted (castellated), 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 temperature)/650 °C, 900 MPa (at ambient temperature)/235 °C, 900 MPa (at ambient temperature)/730 °C and 1 100 MPa (at ambient temperature)/600 °C - Dimensions1 2026-06-26 11:49:43.139