Plug, 15 amp, 125 volt, bladed type, grounded, watertight. Provides a watertight connection when properly installed in mating receptacle assemblies, Symbol 919 or Symbol 1099.1, or in the portable receptacle, Symbol 1215. Also mates with nonwatertight receptacles when watertight integrity is not required. Provided with packing assemblies to provide a watertight seal around the cable being used. Symbol 1218.3 is per MIL-R-2726/38, Military P/N M2726/38-001, NSN 5935-00-220-2213.