MIL-DTL-38999 Series I connectors feature up to 128 contacts in an insert, providing robust connectivity in harsh environments. With a wide operating temperature range of -65 °C to 200 °C, these circular connectors are ideal for demanding applications. Available in various shell sizes and insert arrangements, they offer versatility for different installation needs. Constructed with high-strength aluminum shells and offering multiple plating options, including RoHS-certified finishes, these connectors ensure reliable performance. The series includes front and rear wall mount, jam nut receptacles, and RFI grounding plugs, all meeting stringent military specifications. With gold-plated removable crimp contacts and bayonet coupling, they guarantee secure and durable connections. Suitable for environment-resistant box and through bulkhead mounting receptacle types, these connectors are essential for critical operations.