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.

Post Onsite · Hardware & Fasteners
633FD3X4
In stock · ships from Knoxville
This is a cam and groove (Camlock) adapter used to connect two lines or hoses of different sizes.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
We don't publish fitment for this part yet. Rather than guess, get it confirmed against your truck in under a minute.
It has a 3-inch male camlock end that mates with a female coupler, and a 4-inch male NPT threaded end that screws into a female threaded pipe or fitting. This type of fitting is typically used on tanker trucks, bulk liquid transfer, and industrial fluid handling systems to provide a quick-connect point while adapting between 3-inch and 4-inch flow paths. You would replace this part if the aluminum body is cracked, the threads are damaged, or the camlock arms no longer secure tightly.
Part Number: 633FD3X4
3MALE X 4NPT ADAPTOR
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more