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Automann · Hardware & Fasteners
177.84210
In stock · ships from Knoxville
A 5/8-inch SAE straight union coupling designed to connect two sections of copper or nylon tubing in heavy-duty truck and trailer pneumatic systems.
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Verified fitment for 3 applications
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All confirmed applications for this part number.
Other applications
Other applications
Fits any truck or trailer with 5/8" OD air or hydraulic tubing using SAE compression fittings; always verify tubing size and thread compatibility before installation.
Part data verified against 2 catalog sources
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It is commonly used in air brake, air suspension, and air accessory lines to create a secure, leak-free joint that can be easily disassembled for repairs or maintenance. You would replace this coupling if it becomes corroded, cracked, or develops a persistent air leak that cannot be resolved by tightening.
Part Number: 177.84210
UNION COUPLING 5/8IN
Unit: ea
Dealer: KP Services Crossville
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