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.

Globetech Manufacturing · Air System
GT-5339
In stock · ships from Knoxville
A service (blue) gladhand coupler with an integrated shut-off valve.
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
Service side (blue) gladhand; fits any standard SAE J318 style coupler. Not for emergency (red) lines.
Part data verified against 2 catalog sources
Numbers this part supersedes or interchanges with. Showing 4 of 4.
Different year, make, or config? Get a confirmation against your truck in under a minute.
It connects the tractor's service air line to the trailer, delivering air to the trailer brakes. The shut-off allows the driver to isolate the trailer air supply without uncoupling the gladhand, which is useful for yard spotting or when a trailer is dropped. Replace if the rubber seal is cracked, the shut-off lever is damaged, or there is an air leak that cannot be fixed by seal replacement.
Part Number: GT-5339
GLADHAND, SVC W/SHUT-OFF
Unit: ea
Dealer: Knox Trailers
Compatibility, alternatives, and more
Parts commonly needed alongside air system