MIL-DTL-38999 Series II connectors feature up to 128 contacts in an environmentally sealed insert, designed for rugged use with an operating temperature range of -65 °C to 200 °C. With various mounting options such as front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility in installation. Available in 9 shell sizes and 52 insert arrangements, they use M39029 rear release crimp contacts in sizes 22D, 22M, 22, 20, 16, and 12. Constructed with aluminum shells and offering plating options like electroless nickel, they ensure durability in harsh environments. RoHS compliant finishes are also available. Suitable for military and industrial applications, these connectors provide reliable electrical connections with gold-plated contacts, bayonet coupling, and conductive pin contact style, meeting stringent quality and performance standards.