The MIL-DTL-38999 Series I connectors offer robust connectivity with up to 128 contacts in an environmentally sealed insert. Operating efficiently in extreme temperatures ranging from -65°C to 200°C, these connectors are ideal for harsh environments. Featuring front wall mount, rear wall mount, and jam nut receptacles, they ensure reliable performance. With 52 insert arrangements and M39029 rear release crimp contacts, they provide versatility in applications. Constructed with high-strength aluminum shells and available in various plating options like electroless nickel and cadmium finishes, these connectors guarantee durability. Suitable for military and industrial use, they comply with RoHS regulations, meeting environmental standards.