Normally used with a trailer where only limited functionality (taillights. brake lights) is needed. Ideal for boat trailers. or RVs towing a car on a flatbed trailer. Diecast metal housings. Screw terminals accept up to 12AWG wire. Replaceable interiors. Brass split-pin contacts are aligned to assure proper contact and minimal voltage drop. Spring-loaded socket doors. plug locks securely into the opening. Wiring codes are identified on the insulator. Two mounting holes on the flange 17/64"" (6.7mm) diameter. 2 15/16"" (74.6mm) on centers. Mount through 1 3/8"" (34.9mm) diameter hole. With special housing that protects terminals from roadsplash. See also Automotive Connectors such as 11134 and M-115