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
40CX40CAL
In stock · ships from Knoxville
This is a 4-inch aluminum double female cam and groove coupling, also known as a Type DD coupler.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 3 applications
Add your truck to see whether it's one of them
All confirmed applications for this part number.
Other applications
Other applications
Fits any 4-inch male camlock adapter regardless of vehicle or equipment brand. Specifically listed for tank truck and liquid handling service.
Part data verified against 3 catalog sources
Numbers this part supersedes or interchanges with. Showing 2 of 2.
Different year, make, or config? Get a confirmation against your truck in under a minute.
It connects two hoses or pipe sections that both end in a 4-inch male camlock adapter, allowing quick, tool-free connections and disconnections. Commonly used on tanker trucks, fuel delivery hoses, agricultural liquid transfer, and industrial fluid handling systems. You replace it when the cam arms wear out, the gasket fails, or the aluminum body cracks, causing leaks.
Part Number: 40CX40CAL
4' COUPLER X 4' COUPLER
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more