MIL-DTL-38999 Series I connectors offer robust functionality with up to 128 contacts in an environmentally sealed insert. Designed for harsh environments, these connectors feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for reliable connections. With a wide operating temperature range of -65 °C to 200 °C, these connectors are ideal for demanding applications. Constructed with high-strength aluminum shells and various plating options including gold and electroless nickel, they ensure durability and reliable performance. RoHS compliant finishes are also available, making them suitable for diverse industrial and military settings.