MIL-DTL-38999 Series II connectors, designed for harsh environments, feature up to 128 contacts in an insert with front and rear wall mount options, jam nut, and box mount receptacles. With operating temperatures ranging from -65 °C to 200 °C, these connectors offer reliability in extreme conditions. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts for secure connections. Constructed with aluminum shells and offering various plating options, including RoHS compliant finishes, these connectors ensure durability and performance. With EMI/RFI shielding and gold-plated contacts, they guarantee optimal signal integrity. Suitable for military and industrial applications, they provide excellent conductivity and environmental resistance for critical operations.