BS 05/30128671 DC ISO 8279. Aerospace. Nuts, hexagonal, plain, normal-height, normal across flats, with MJ threads, classifications: 600 MPa (at ambient temperature)/120 degreesC, 600 MPa (at ambient temperature)/235 degreesC, 900 MPa (at ambient temperature)/425 degreesC, 1 100 MPa (at ambient temperature)/235 degre

standard by BSI Group, 02/02/2005