Trailer & RV Connectors: Trailer Connectors: 7-pole Connector Sockets (Wire Insertion Style): 40 amps continuous duty @ 6-28 VDC Meets & exceeds all rigid anti-skid standards of FMVSS-121, SAE J560 & ISO 1185 . (SAE applies only to Solid Pin versions) Accepts the widest ranges of wires (16GA to 8GA) Optimum slant mount & drain slot rids housing interior of moisture Recommended Mounting Hole is 2\" diameter Zinc Die-Cast Units are self-grounding (to #1 Ground Terminal) Available in Zinc Die-Cast Housing & Glass Filled Nylon High impact molded insulators have wire codes permanently molded into them for easy identification. Available in 7, 6, & 4 pole configurations Integral cable clamp prevents cable from being pulled loose from connections All sockets contain 2 mounting holes and have a Stainless Steel spring-loaded flap cover Hi Impact molded insulators Brass Terminal Screws for best conductivity Solid Floating Contact pins for maximum contact & easy alignment Extended bumper-type plug interior prevents damage to shell Applications: Tractors, Trailers, RV, Farm Equipment & Cars.