Metal parts are precision machined from heavy, specially shaped brass extrusion. Cam action design of male half connector pulls the two halves tightly together. Connector covers are molded from a special heat and cold resistant material. Covers have no metal liner to rust or corrode. Covers are available in Black, Red, Yellow, Pink, Blue, Light and Dark Green, and Orange.
Coloured covers make it easy to locate the connectors for field use.
Also identify Cable Leads easily for contractors and field erectors.