MIL-DTL-38999 Series I connectors offer robust performance in harsh environments with up to 128 contacts housed in an environmentally sealed insert. Designed for durability, they feature front wall mount, rear wall mount, and jam nut receptacles, along with RFI grounding plugs. With a wide operating temperature range of -65°C to 200°C, these connectors are suitable for demanding applications. Available in 9 shell sizes and 52 insert arrangements, they utilize M39029 rear release crimp contacts for secure connections. Constructed with high-strength aluminum shells, they come in various plating options, including cadmium-free finishes for RoHS compliance. These circular plugs, with gold-plated removable crimp contacts, offer reliable conductivity and a mating type of bayonet for easy installation. Meeting MIL-DTL-38999 I military specifications, they ensure performance excellence in critical environments.