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)
Aerospace - Nuts, hexagonal, slotted (castellated), reduced height, normal across flats, with MJ threads, classifications: 450 MPa (at ambient temperature)/120 °C, 450 MPa (at ambient temperature)/235 °C, 600 MPa (at ambient temperature)/425 °C, 900 MPa (