This International Standard specifies the dimensions of plain, hexagonal nuts, reduced height, normal across flats, with MJ threads, of classifications: 450 MPa/120 ℃, 450 MPa/235 ℃, 600 MPa/425 ℃, 900 MPa/235 ℃, 900 MPa /315 ℃ , 900 MPa /650 ℃ 1 100 MPa /235 ℃ , 1 100 MPa /730 ℃ , and 1 250MPa/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 314-1997由英国标准学会 GB-BSI 发布于 1997-08-15,并于 1997-08-15 实施。
BS A 314-1997 在中国标准分类中归属于: V20 紧固件,在国际标准分类中归属于: 49.030.30 螺母。
BS A 314-1997 航空航天.带MJ螺纹的高度降低和标准交叉平面的平六角头螺母分类:450 MPa(室温)/120℃、450 MPa(室温)/235℃、600 MPa(室温)/425℃、900 MPa(室温)/235℃、900 MPa(室温)/315℃、900 MPa(室温)/650℃、1100 MPa(室温)/235℃、1100 MPa(室温)/730℃、1250 MPa(室温)/600℃寸 于 2016-03-31 变更为 BS ISO 9609-2016 航空航天.带MJ螺纹的高度降低和标准交叉平面的平六角头螺母分类:450 MPa(室温)/120℃、450 MPa(室温)/235℃、600 MPa(室温)/425℃、900 MPa(室温)/235℃、900 MPa(室温)/315℃、900 MPa(室温)/650℃、1100 MPa(室温)/235℃、1100 MPa(室温)/730℃、1250 MPa(室温)/600℃.尺寸。
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