MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, offering robust environmental sealing for harsh operating conditions. With an impressive temperature range of -65 °C to 200 °C, these connectors are ideal for demanding applications. Available in various shell sizes and insert arrangements, they accommodate M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8. The high-strength aluminum shells come in a range of plating options including cadmium-free finishes. This connector family includes front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs, ensuring versatility in installation. Compliant with the MIL-DTL-38999 I military specification, these circular receptacles with bayonet coupling offer reliable performance with gold-plated contacts, meeting stringent quality and performance standards for defense and aerospace applications.