DIN 65269-1987
航空航天.公称抗拉强度900MPa 使用温度为235以下的钢制短螺纹长度MJ螺纹的带筋状翼形的扭矩调节十字槽头紧公差埋头螺钉.
Aerospace; countersunk head screws, close tolerance, with ribbed TORQ-SET (ACR) recess and MJ thread, short thread length, steel, nominal tensile strength 900 MPa, for temperatures up to 235 °C