Souriau Mil-Spec Circular Connectors 38999 Series I, II, III & 26482 Series I & II offer a complete range of standard and derived circular connectors for harsh environments. Suitable for military, railway, and extreme industrial applications, these connectors are based on the MIL-DTL38999 and MIL-DTL-26482 standards. Micro, QPL, Hermetics, High Density, and High Speed versions are available.