The MIL-DTL-38999 Series II connectors feature up to 128 contacts within an environmentally sealed insert, designed for harsh environments with a wide operating temperature range of -65 °C to 200 °C. Available in various styles including front and rear wall mount, jam nut, and box mount receptacles, they offer versatility in installation. These connectors, compliant with military specification MIL-DTL-38999 II, come in aluminum shells with options for RoHS-certified finishes. With gold-plated removable crimp contacts, they ensure reliable conductivity. Ideal for demanding applications, they are engineered for 500 mating cycles, meeting the stringent requirements of service Class E for environment-resistant box and bulkhead mounting.