121659-0866 is a jam nut receptacle connector with endbell designed for heat shrink boot and grommet seal applications. This connector is part of the ITT Cannon KPT/KPSE/KPTC series manufactured in accordance with VG95328 specifications for harsh environment interconnect solutions. The receptacle features UNEF threading and supports panel thickness ranging from 1.6 mm minimum to 3.5 mm or 6.5 mm maximum depending on shell size. Available in multiple shell sizes from 8 to 24, the connector provides reliable panel mounting with precise dimensional tolerances. This connector is ideal for military, aerospace, and industrial applications requiring robust, water-tight connections in demanding environments.