標準號：SAE MA 1370-1990
中文標準名稱：MJ剖面螺紋,公制[代替: SAE AS 1370A]
英文標準名稱：Screw Threads - MJ Profile, Metric [Superseded: SAE AS 1370A]
標準類型：V20
發布日期：1990/1/1 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：V20
國際標準分類號：49.030.10
引用標準：ISO 68-1973;ISO 261-1973;ISO 965-1-1980;ISO 965-3-1980;ISO/R 1501-1970;SAE AS 1337;SAE AS 1338-1976;SAE AS 1421-1976;SAE MA 1566
適用范圍：To establish a metric module version of the UNJ profile, MIL-S-8879 inch screw thread standard, predominantly used in aerospace inch designs. This standard specifies the characteristics of the MJ profile metric series of screw threads, altered from ISO 68 M Profile, to include a mandatory controlled radius of 0.18042P to 0.15011P at the root of the external thread and with the minor diameter of both external and internal threads increased to provide a basic thread height of 0.5625H in order to accommodate the external thread maximum root radius.