DIN 65317-1987
航空航天.公称抗拉强度1100MPa使用温度为235℃以下的钢制短螺纹长度MJ螺纹的带有筋状翼形的扭矩调节十字槽头埋头螺钉
Aerospace; countersunk head screws with ribbed TORQ-SET (ACR) recess and MJ thread, short thread length, steel; nominal tensile strength 1100 MPa, for temperatures up to 235 °C
