MIL-DTL-38999/24 Series III connectors, also known as D3899924FJ35SB, are high-performance circular receptacles designed for harsh environments. With a rugged jam nut mounting system and removable crimp contacts, these connectors ensure secure and reliable connections in military and aerospace applications. Featuring 128 gold-plated contacts in a size 22D(128) arrangement, they offer excellent conductivity and signal integrity. The electroless nickel coating on the aluminum shell provides enhanced durability and environmental resistance, with a service rating of M and service class F. Engineered for demanding conditions, these connectors have a wide operating temperature range from -65°C to 200°C and meet stringent military specifications. RoHS non-compliant.