MIL-DTL-38999 Series II connectors feature up to 128 contacts in an insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various mounting options including front and rear wall mount, jam nut, and box mount receptacles, these connectors offer versatility for different applications. With 52 insert arrangements and M39029 rear release crimp contacts, they ensure reliable connectivity. Constructed with aluminum shells and plated with options like gold and electroless nickel, they provide durability and performance. Ideal for military and aerospace use, these connectors are built to withstand rugged conditions with RoHS compliant finishes available.