MIL-DTL-38999 Series II connectors offer robust performance in harsh environments, boasting up to 128 contacts within an insert. These circular connectors are designed for military specifications, featuring front and rear wall mount options, jam nut, and box mount receptacles. With a wide operating temperature range of -65 °C to 200 °C, they ensure reliable connectivity in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, these connectors use M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering various plating options, including cadmium-free finishes, they meet stringent RoHS standards. Suitable for diverse applications, these connectors provide EMI/RFI shielding and are ideal for environments requiring high reliability and performance.