MIL-DTL-38999 Series I connectors feature up to 128 contacts within an environmentally sealed insert, suitable for harsh environments with an operating temperature range of -65°C to 200°C. Available in various shell sizes and insert arrangements, these connectors offer versatility with front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Constructed with high-strength aluminum shells and utilizing M39029 rear release crimp contacts, they ensure reliable performance. Plating options include cadmium-free finishes, meeting RoHS certification requirements. Ideal for military and aerospace applications, these connectors guarantee durability and conductivity, with a service life of 500 cycles.