Your cart is empty
Browse our catalog to find the parts you need.
These images are illustrative and may not match the product exactly. Always verify by part number — or confirm instantly with the assistant using a photo or VIN.

Phillips Industries · Electrical & Lighting
PHI16-722
In stock · ships from Knoxville
This is a 7-pin trailer electrical socket for the nose of a heavy-duty truck (the tractor side) that connects the tractor to the trailer's lighting and ABS systems.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 1 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Other applications
Other applications
Universal fit for standard 7-way tractor-trailer connections; ring terminals accept #8 ring connectors (per manufacturer); confirm your mount hole spacing before ordering.
Part data verified against 5 catalog sources
Numbers this part supersedes or interchanges with. Showing 6 of 6.
Different year, make, or config? Get a confirmation against your truck in under a minute.
It's made of rugged nylon with Phillips' STA-DRY® design, which seals the inner cavity to stop moisture and corrosion from traveling into the wire harness. It uses ring terminals to connect your wiring, a split-pin contact arrangement, and a 2-hole flange for mounting. You'd typically replace this when the old socket is cracked, corroded, has damaged pins, or is causing intermittent lights and ABS warning faults.
Part Number: PHI16-722
7-WAY SOCKET, NYLON, SPLIT PIN, RING TERMINAL
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside electrical & lighting