DIN 65289-1987
航空和航天.公称抗拉强度1100MPa使用温度为315℃以下的钛合金制短螺纹长度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, titanium alloy, nominal tensile strength 1100 MPa, for temperatures up to 315 °C