MIL-DTL-38999 Series I connectors are designed for harsh environments, featuring up to 128 contacts in an insert. These circular receptacles, available in back panel box mounting flange configurations, offer secure bayonet coupling. With a wide operating temperature range from -65°C to 200°C, they are ideal for demanding applications. Constructed with high-strength aluminum shells, they ensure durability. The connectors come in various plating options, including RoHS-certified finishes, meeting stringent environmental standards. M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 8 (coax and twinax) are utilized, guaranteeing reliable connectivity. Choose from 52 insert arrangements for flexible installation. The MIL-DTL-38999 I connectors, with their RFI grounding plugs, provide enhanced performance and protection in critical military and industrial environments.