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.

Sloan · Air System
378-6-6
In stock · ships from Knoxville
This is a male connector air hose fitting with a spring guard, used to attach 3/8-inch SAE J1402 air brake hose to a 3/8-inch male NPT threaded port.
Confirm the part fits before you buy. Applications and interchange numbers are researched and audited per part.
Verified fitment for 2 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 vehicle or component with standard SAE J1402 3/8" hose and 3/8" NPT female thread. Common replacement part.
Part data verified against 3 catalog sources
Numbers this part supersedes or interchanges with. Showing 9 of 9.
Different year, make, or config? Get a confirmation against your truck in under a minute.
It's commonly found in heavy-duty truck, trailer, and bus air brake systems, connecting hose lines to brake chambers, air tanks, or valves. The spring guard helps protect the hose from kinking and wear near the fitting, extending the life of the hose assembly. Replace it when you're building a new hose line or if the old fitting is corroded, leaking, or damaged.
Part Number: 378-6-6
AIR LINE FITTING W/SPRING 378-6-6
Unit: ea
Dealer: Post Onsite
Compatibility, alternatives, and more
Parts commonly needed alongside air system