... volume,quickly mating Structure characteristic1. This series is equivalent to MD series of America.2. This series’ core has specifications of 9, ... to MIL-C-83513). J30J ordinary type seriesJ30J ordinary type series is includes subseries of compressing connection, welding connection, straight ... – A1J30J: metal shell25: number of contact elements-9, 11, 15, 17, 19, 21, 25, 31, 37, 39, 51, 66, 74, 100TJ ...