ISO 5856 - 2008 航空航天 强度≤1100Mpa 金属材料 标准杆 短或中等长度MJ螺纹 偏十字槽 100°沉头螺钉 Aerospace - Screws, 100 degrees normal countersunk head, internal offset cruciform ribbed or unribbed drive, normal shank, short or medium length MJ threads, metallic material, coated or uncoated, strength classes less than or equal to 1 100 MPa - Dimensi