The MIL-DTL-38999 Series I connectors feature up to 128 contacts within an environmentally sealed insert, designed for harsh environments with an operating temperature range of -65 °C to 200 °C. Available in various shell sizes and insert arrangements, these connectors offer versatility for different applications. They come in high-strength aluminum shells with options for plating, including cadmium-free finishes. The connector types include front and rear wall mount receptacles, as well as jam nut receptacles, all featuring RFI grounding plugs. Utilizing M39029 rear release crimp contacts, these connectors ensure secure and reliable connections. With a mating type of bayonet and contact gender of male, they are suitable for demanding military and industrial environments. Their durability is evidenced by a mating life of 500 cycles, making them ideal for long-term use in critical systems. RoHS compliance ensures environmental responsibility in their production.