ISO 9255 - 2008 12角法兰面螺钉 - 中短MJ螺纹 - 强度等级小于等于1100MPa 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 1100 MPa
ISO 9254 - 1993 12角(十二键)法兰面螺钉 - 长MJ螺纹 - 强度等级小于等于1100MPa Aerospace - Bolts, Normal Spline Head, Normal or Pitch Diameter Shank, Long Length MJ Threads, Metallic Material, Coated or Uncoated, Strength Classes Less Than or Equal to 1100 MPa