MD/J30 connector they are equal of MD and MDM series ... of GJB2446 ”general norms of shell locating microminiature rectangular electric connector” (equivalent to MIL-C-83513). J30J ordinary type ... free terminal locking component:Used for free terminal products, it has types of L, K, K1 and so on ... .J30J fixed terminal locking component:Used for fixed terminal products, it has types of P, P0, P1, P2, P3, ...