Amphenol's TVS07RF-21-16P Tri-Start MIL-DTL-38999 Series III connectors are engineered for demanding environments requiring extremely reliable interconnections. Originally developed for military and commercial aircraft, these circular connectors combine high coupling durability with robust EMI shielding and resistance to moisture and corrosion. They feature quick-mating capabilities and environmentally-sealed construction, making them suitable for applications such as high-performance military aircraft, commercial airlines, communications equipment, armored personnel carriers, missiles, and shipboard systems. The connectors operate across a wide temperature range (-85°F to +392°F) and offer high-density contact arrangements up to 128 contacts per connector.