MIL-DTL-38999 Series I connectors feature up to 128 contacts in an environmentally sealed insert, designed for harsh environments with an operating range of -65 °C to 200 °C. Offering front wall mount, rear wall mount, and jam nut receptacles, they ensure secure connections. Utilizing M39029 rear release crimp contacts, these connectors come in 9 shell sizes and 52 insert arrangements, accommodating various applications. Constructed with high-strength aluminum shells and available in different plating options, including RoHS-compliant finishes, they guarantee reliability. With a mating type of bayonet and contact gender of female, these connectors are ideal for back panel box mounting and through bulkhead installations, providing efficient electrical connectivity in demanding conditions.