ISO 9199:1998
航空航天.等级为:1100 MPa(环境温度)/425℃、1100 MPa(环境温度)/650℃、1210 MPa(环境温度)/425℃、1210 MPa(环境温度)/730℃、1550 MPa(环境温度)/235℃、1550 MPa(环境温度)/425℃和1550 MPa(环境温度)/600℃,带MJ螺纹的十二角自锁螺母.尺寸
Aerospace - Nuts, bihexagonal, self-locking, MJ threads, classifications: 1100 MPa (at ambient temperature)/425 °C, 1100 MPa (at ambient temperature)/650 °C, 1210 MPa (at ambient temperature)/425 °C, 1210 MPa (at ambient temperature)/730 °C, 1550 MPa (at