ISO 9255. Aerospace. Bolts, normal spline head, normal shank, short or medium-length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa. Dimensions
ISO 9255 航空航天螺栓 标准花键头 标准柄 短或中等长度MJ螺纹 金属材料 有涂层或无涂层 强度等级小于或等于1100 MPa 尺寸