BS A 318-1997 带MJ螺纹的高度降低和减缩交叉平面的有槽(槽顶)六角头螺母分类:450MPa(室温)/425℃、600MPa(室温)/235℃、600MPa(室温)/315℃、600MPa(室温)/650℃、900MPa(室温)/235℃、900MPa(室温)/730℃、1100MPa(室温)/600℃.尺寸
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
This International Standard specifies the dimensions of hexagon slotted (castellated) nuts, reduced height, reduced across flats, with MJ threads, of classifications: 450 MPa/425 ℃, 600 MPa/235 ℃, 600 MPa/315℃, 600 MPa /650 ℃, 900 MPa/235 ℃, 900 MPa/730 ℃ and 1 100 MPa/600 ℃.
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.
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.