ISO 5856 - 2008 航空航天 強度≤1100Mpa 金屬材料 标準杆 短或中等長度MJ螺紋 偏十字槽 100°沉頭螺釘 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