This International Standard specifies the dimensions of hexagon slotted (castellated) nuts, reduced height, normal across flats, with MJ threads, of classifications: 450MPa/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℃. These nuts are intended to be used with split pins in conformity with ISO 1234. This International Standard is 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. 3) To be published. (Revision of ISO 1234:1976)
BS A 315-1997由英国标准学会 GB-BSI 发布于 1997-08-15,并于 1997-08-15 实施。
BS A 315-1997 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 315-1997 航空航天.带MJ螺纹的高度降低和标称交叉平面的有槽(齿形)六角头螺母分类:450MPa(室温)/120℃、450MPa(室温)/235℃、600MPa(室温)/425℃、900MPa(室温)/235℃、900MPa(室温)/315℃、900MPa(室温)/650℃、1100MPa(室温) 于 2016-03-31 变更为 BS ISO 9618-2016 航空航天.等级为:450 MPa(环境温度)/120℃、450 MPa(环境温度)/235℃、600 MPa(环境温度)/425℃、900 MPa(环境温度)/235℃、900 MPa(环境温度)/315℃、900 MPa(环境温度)/650℃、1100 MPa(环境温度)/235℃、1100 MPa(环境温度)/730℃、1250 MPa(环境温度)/600℃,带MJ螺纹、具有减小高度和正常对边尺寸的开槽六角螺母.尺寸。
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