MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting options including front wall, rear wall, and jam nut receptacles, they offer RFI grounding plugs for added versatility. With 52 insert arrangements and M39029 rear release crimp contacts, these connectors ensure secure and reliable connections in aerospace and defense applications. Constructed with high-strength aluminum shells and offering RoHS certified finishes, they provide durability and compliance assurance. The MS27468 model, specifically a jam nut mounting receptacle with 21 gold-plated contacts, is part of this reliable military specification connector series.