The MIL-DTL-38999 Series I connectors offer a durable solution for demanding environments with up to 128 contacts housed in an insert. Designed for harsh conditions, these connectors feature front and rear wall mount options, as well as jam nut receptacles, all sealed for environmental protection. With a wide operating temperature range of -65°C to 200°C, they ensure reliable performance in extreme temperatures. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts in various sizes. Constructed with high-strength aluminum shells, they come in a range of plating options, including cadmium-free finishes for RoHS compliance. Ideal for military and industrial applications, these connectors are designed for 500 mating cycles, offering long-lasting conductivity and reliability in the field.